DOCUMENT GLANCING AND NAVIGATION
BACKGROUND
[0001] When a user is reading a document on a device equipped with an electronic
screen, there are various options available for navigating and viewing the document. As to
navigation, software on the device may present a scroll bar alongside the document. The
scroll bar may have a track with a "thumb" in the track, and arrows at either end of the
track. To move up and down the document, the user can either click up or down arrows,
or can drag the thumb in the track, or can click on some point within the track.
[0002] As to viewing, the user may have various zoom options. The document may
have a native resolution, and the user may be able to view the document at this native
resolution (100% zoom), or may set the zoom level up or down. Some applications or
software environments allow the user to set the zoom level based on certain physical
parameters of the window. For example, there might be an option to set the zoom level
such that the width of a page of the document fills the width of the window. Or, there
might be an option to set the zoom level such that the document appears as large as it can,
while still fitting inside of one window.
SUMMARY
[0003] Navigation and viewing features may be combined in a way that allows a user to
navigate through a document while glancing at specific parts of the document as part of a
single flow of actions.
[0004] A document that is being shown to a user may have a navigation bar with a
thumb. Before the user clicks on the thumb, the user may be viewing a specific part of the
document at a first zoom level. When the user uses a pointing device to click and hold
down the thumb, the zoom level may be set to a second zoom level. The second zoom
level is such that the entire page fits in the viewing area. While the user holds down the
thumb, a flyout from the navigation bar may be shown; the flyout may show, for example,
a thumbnail of the page and/or the page number. While the user holds down the thumb,
the user may move the thumb up or down to change the page that appears in the window.
While the user holds and moves the thumb, whatever page appears in the window appears
at the second zoom level. If a flyout appears, the flyout may change to show a thumbnail
and/or the number of the appropriate page, while the user is moving the thumb. When the
user releases the thumb (either after having moved it, or without having moved it), the
page that is currently shown in the window switches to the first zoom level. Also, if a
flyout is present, releasing the thumb may cause the flyout to disappear.
[0005] If the user clicks on a non-thumb part of the navigation bar, various actions may
be taken. For example, if the bar is calibrated to the number of pages in the document
(e.g., if the page corresponding to one-quarter of the way down the navigation bar is the
page that is approximately one quarter of the way from the first page to the last page), then
clicking on a non-thumb part of the navigation bar may cause the page corresponding to
that position to be shown in the window at the second zoom level, and/or may cause a
flyout for that page to be shown.
[0006] This Summary is provided to introduce a selection of concepts in a simplified
form that are further described below in the Detailed Description. This Summary is not
intended to identify key features or essential features of the claimed subject matter, nor is
it intended to be used to limit the scope of the claimed subject matter.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIG. 1 is a block diagram of an example view of an application, in which
navigation and glancing may occur.
[0008] FIG. 2 is a block diagram of the example view of FIG. 1, with the thumb having
been dragged to a different position along a track.
[0009] FIG. 3 is a block diagram of the example view of FIG. 1, with the user having
released the thumb.
[0010] FIG. 4 is a flow diagram of an example process in which a user switches from
detailed reading, to glancing, and then back to detailed reading mode.
[0011] FIG. 5 is a flow diagram of an example process that may occur if a user clicks
the navigation bar at a location other than the thumb.
[0012] FIG. 6 is a block diagram of example components that may be used in
connection with implementations of the subject matter described herein.
DETAILED DESCRIPTION
[0013] Devices, and the software used on devices, provide mechanisms for reading a
document. Two basic operations that a user can perform in order to view a document are
navigation (moving to different positions in the document) and changing the zoom level.
When users are reading documents, they may want to see the document in different ways
to achieve different purposes. For example, when a user wants to read the document
closely, the user may want to view the document at a high zoom level so that the words are
easy to read. On the other hand, the user may want to look at large portions of the
document at once in order to find a particular element in the document, such as a particular
picture, chart, or section heading. This latter way of looking at the document may be
referred to as "glancing", and it is typically done at a low zoom level. Since the purpose
of glancing is to find a part of the document quickly, rather than to examine the document
in detail, the user may be willing to accept a loss of visual detail in order to see more of
the document at once.
[0014] Users may want to switch quickly between detailed viewing and glancing. For
example, a user might want to find a picture in a document, then read the section
associated with that picture, then find another section of the document, then read that other
section, etc. However, many user interfaces do not allow the user to switch easily between
glancing and detailed reading, while also being able to move around the document, as part
of a single flow of actions.
[0015] The subject matter herein allows a user to combine detailed reading with
glancing in a seamless way. A document of any type (e.g., a word processing document, a
drawing, a document in Portable Document Format (PDF), etc.) may be shown to a user in
a window that has a navigation bar. The navigation bar has a track, and also has a thumb
that can be moved within the track. The user can move up and down the document by
using a pointing device (such as a mouse, track pad, touch screen, etc.) to click and hold
the thumb, while dragging the thumb in the track. Prior to the user clicking the thumb, the
document may be shown at a first zoom level. This zoom level may be the native zoom
level associated with the document, or may be a zoom level that has been pre-selected by
the user (or by some other entity). When the user clicks and holds the thumb, the
document changes to a second zoom level. The second zoom level may be a "full-page"
zoom level that is chosen so that an entire page of the document fits within the window.
In one example, the "full-page" zoom level provides more detail than a thumbnail, which
provides sufficient fidelity to allow the user to read the content, or otherwise to discern a
page's detail, even when the document is being shown at the second zoom level. The user
may then release the thumb, thereby causing the zoom level to return to the first zoom
level. Or, the user may drag the thumb along the track, thereby moving from page to page
in the document. As the user moves through the pages, each page may be shown in the
window at the second zoom level, thereby allowing a full-page view. When the user
releases the thumb, the page that is currently being shown in the window may switch to
the first zoom level, which may be, for example, a zoom level that allows for comfortable
detailed reading.
[0016] In addition to being able glance at pages at a full-page zoom level by clicking the
thumb, the user may also be able to glance at pages by clicking elsewhere on the
navigation bar's track. For example, if the navigation bar is calibrated to the number of
pages in the document (e.g., if the page corresponding to one-quarter of the way down the
navigation bar is the page that is approximately one quarter of the way from the first page
to the last page), then clicking and holding the non-thumb part of the navigation bar's
track at a particular position may cause the page corresponding to that position in the
document (e.g., page 25 out of a 100 page document) to be shown in the window at the
second zoom level, and a flyout may also be shown that represents that page. Releasing
the click may resume viewing at the original zoom level, either at the place in the
document where the user had been viewing before the click, or at the place in the
document indicated by where, on the navigation bar, the user clicked.
[0017] It is noted that some systems may provide a way for users to switch to a full-page
zoom level while navigating. E.g., a device may switch to a full-page zoom level when
the user clicks the thumb, and may then allow the user to flip through pages the full-page
zoom level. However, such devices may not switch back to the native or previous zoom
level when the user releases the thumb, so the actions of the user do not constitute a
seamless transition between glancing and detailed reading. Moreover, it is noted that a
system that switches to full-page zoom when the user holds the thumb, and then switches
back to the native or previous zoom level when the user releases the thumb, is not an
obvious change from a system that switches to full-page zoom level when the user hold
the thumb but that does not switch back to the previous zoom level when the user releases
the thumb. In the former case, the user is able to switch back and forth between detailed
reading and glancing with a simple set of motions that flow together. On the other hand,
in the latter case, the change from one zoom level to another is durable, and does not
constitute a way of changing back and forth between glancing and detailed reading.
[0018] Turning now to the drawings, FIG. 1 shows an example view of an application,
in which navigation and glancing may occur. In the example of FIG. 1, the view that is
shown is window 102, as might be shown on a personal computer, although the view
could take any form appropriate for the device or platform on which it is being shown.
For example, a phone or music player might have an operating system that does not
provide windows as part of the user interface, in which case the view of an application
might be the entire screen of such a device. It will be understood that, while FIG. 1 uses
window 102 as an example view, the features described in FIG. 1 apply to any appropriate
type of application view (e.g., a full-screen view on certain models of phone that support
only a single view at a given time).
[0019] In this example, the application shown in window 102 is a "Viewer Application,"
which allows the user to see some type of document, such as a PDF document, a word
processing document, etc. An example document 114 is shown within window 102. The
example document 114 is shown as a text document containing the "Lorem ipsum . .."
placeholder text, although document 114 could be any type of document - e.g., a
spreadsheet, a slide deck, a set of images, etc.
[0020] Window 102 has a navigation bar 104, which may include various features such
as up arrow 106 and down arrow 108 (which the user can click to move up and down the
document), thumb 110, and track 112 in which thumb 110 moves. Navigation bar 104
may be provided by the application itself, or may be provided by the operating system
under which the application operates. In the example of FIG. 1, navigation bar 104 is
shown as being oriented vertically, although an alternative (or additional) navigation bar
could be oriented horizontally. Clicking and dragging thumb 110 allows the user to
change the current position of the document, as does clicking an arbitrary point in track
112. Additionally, in accordance with the subject matter herein, if the user clicks and
holds thumb 110, certain things may happen to the way in which the document is being
shown to the user which, in effect, implements a "quick glance" mode of viewing. For
example, clicking and holding thumb 110 may cause the zoom-level of document 114 to
be changed to a full-page zoom level, which is a level at which an entire page of document
can been seen within window 102. (Prior to clicking the thumb, the document may have
been shown at its native zoom level, or at some zoom level that had been set by the user or
chosen in some other way.) In the example of FIG. 1, the use is currently clicking and
holding thumb 110, so the zoom level of document 114 that is shown in FIG. 1 is a fullpage
zoom level. The particular zoom level that is chosen for a full-page level zoom may
be one in which at least one of the dimensions of a page (horizontal or vertical) fits snugly
against or near the corresponding boundaries of the window, without distorting the aspect
ratio of the page. E.g., if boundaries 116 and 118 are the top and bottom boundaries of
window 102, it is noted that the first page of document 114 is shown at a zoom level such
that the top and bottom edges of that page are close to boundaries 116 and 118. In other
words, the document in this example is as shown at, or nearly at, the maximum zoom level
that is possible without overflowing the physical size limits of window 102 in either
dimension.
[0021] While the user is clicking and holding thumb 110, a flyout 120 may be shown.
In the example of FIG. 1, flyout 120 is shown next to thumb 110, although flyout 120
could be shown in any appropriate place on the user's screen. Flyout 120 may contain
various types of information that may help the user to navigate document 114 while
viewing document 114 in glancing mode. In the example of FIG. 1, flyout 120 includes
page number 122 (indicating the number of the page of document 114 that is being shown
at the full-page zoom level), and thumbnail 124 of that page. However, flyout 120 could
contain any appropriate type of information. Additionally, as a way of visually reminding
the user that the page he or she is looking at is part of a document, a graphic 126
suggesting a stack of pages behind the current view may be shown.
[0022] Thus, FIG. 1 shows window 102 as it would look while the user is clicking and
holding the thumb, in order to glance at a document on a per-page basis.
[0023] While the user is clicking and holding the thumb, the user may drag the thumb up
and down track 112, thereby changing the current page while also remaining in glancing
mode. FIG. 2 shows an example of what happens in the window 102 shown in FIG. 1 if
the user drags thumb 110 along track 112.
[0024] In FIG. 2, the user is continuing to hold thumb 110, thereby causing document
114 to continue to be shown to the user at the full-page zoom level. However, in the
example of FIG. 2, the user has dragged thumb 110 from near the top of track 112 to a
point in the middle of track 112, thereby repositioning the current view of document 114
from page 1 (as shown in FIG. 1) to page 10. With this move having been made, page 10
is shown in window 102, and - if flyout 120 is being shown - then flyout 120 may be
changed to reflect the current page that is being shown, and also by showing a thumbnail
of the current page.
[0025] After the user has repositioned the document to a particular place by dragging the
thumb, the user may release the thumb, thereby returning the document to the zoom level
at which the document had been shown prior to the user's clicking and holding the thumb.
FIG. 3 shows what happens when the user releases the thumb after having dragged the
thumb to page 10 of the document.
[0026] In FIG. 3, window 102 still contains navigation bar 104, including thumb 110.
However, in FIG. 3 the user has released thumb 110, thereby causing document 114 to be
shown at whatever zoom level was being shown before the user clicked and held thumb
110. For example, document 114 might have been shown at the native zoom level
specified by the creator of document 114, or at a zoom level specified by the user, or at a
zoom level specified by system default, or at a zoom level chosen in any other way. In the
example of FIG. 3, the zoom level that is shown is a higher zoom level (thus, larger print)
than the full-page zoom level. Whatever the zoom level was prior to clicking and holding
the thumb, releasing the thumb may return to that zoom level. However, if the user
dragged the thumb thereby causing the current position of the document to change to
another page, then - when the zoom level reverts to the previous zoom level - the page
that will be shown is the one that the user has selected by dragging, rather than the page
that was shown before the user clicked, held, and dragged the thumb. In this way, the user
can easily switch between a glancing view and a detailed-reading view, and can use the
glancing view to navigate to the next place in the document where that the user wants to
see in detail.
[0027] It is noted that FIGS. 1-3 show an example in which the user clicks the thumb
and then drags the thumb to reposition the document. However, dragging the thumb is
optional. The user could simply click and hold the thumb to switch to a full-page zoom
level, and then could release the thumb to switch back to the prior zoom level, without
having dragged the thumb to a new position.
[0028] FIG. 4 shows an example process in which a user switched from detailed
reading, to glancing, and then back to detailed reading mode. Before turning to a
description of FIG. 4, it is noted that the flow diagrams contained herein (both in FIG. 4
and in FIG. 5) are described, by way of example, with reference to components shown in
FIGS. 1-3, although these processes may be carried out in any system and are not limited
to the scenarios shown in FIGS. 1-3. Additionally, each of the flow diagrams in FIGS. 4
and 5 shows an example in which stages of a process are carried out in a particular order,
as indicated by the lines connecting the blocks, but the various stages shown in these
diagrams can be performed in any order, or in any combination or sub-combination.
[0029] At 402, the document is being shown at a first zoom level. The view in which
the document is shown may include a navigation bar, including arrows, a thumb, and a
track, as shown in FIGS. 1-3. At 404, the user may click and hold the thumb. The
clicking and holding may be done using any type of pointing device - e.g., by depressing
and holding the left button on a 2-button wheel mouse, by double-tapping and holding a
trackpad, by using a touch screen, or by any other mechanism. A system that receives user
input may determine that the user is clicking and holding the thumb as a result of some
received indication, such as data sent by the pointing device. As a result of clicking and
holding the thumb, the document may be shown at a zoom level that fits one entire page in
the window or other viewing area (at 406). One example of such a zoom level is a fullpage
zoom level that maintains the aspect ratio of the document, while fitting the
document closely against the viewing area's boundaries in at least one dimension.
[0030] At 408, a flyout from the navigation bar may be shown. It is noted that some
implementations of the subject matter herein might not show a flyout, but the subject
matter herein includes those implementations that show a flyout as well as those that do
not. In one example, the flyout may be shown adjacent to the navigation bar. In a more
specific example, the flyout may be shown adjacent to the thumb, and may move
alongside the navigation bar as the user drags the thumb from one place to another. The
flyout could contain any appropriate type of information. One example piece of
information that the flyout could contain is a thumbnail 124 of the current page. Another
type of information that the flyout could contain is the page number 122 of the current
page.
[0031] At 410, the user may drag the thumb while holding the thumb with the pointing
device. E.g., on a mouse, the user may hold the left button on the mouse while moving the
thumb in the track. When the user drags the thumb, this action repositions the current
page to a different point in the document. As the user repositions the document with the
thumb, the page shown in the window may change based on the current position (at 412),
and the flyout may change as well (at 414). The change of page may appear as an
animation - e.g., if the page is changing from page 1 to page 10, then the page shown in
the window (as well as the corresponding flyout) may successively show one or more
intermediate pages between page 1 and 10, rather than jumping from page 1 to page 10. It
is noted that the user might not move the thumb at all, in which case the current position of
the document (and the corresponding page view and flyout) would not change.
[0032] At 416, the user releases the thumb, either after having dragged the thumb to a
new position, or after having not moved the thumb thereby leaving the thumb in its
original position. Upon release of the thumb, whatever page is the current page resumes to
being shown at the first zoom level (at 418) - i.e., the page may resume to the zoom level
at which the document was being viewed at 402 before the user clicked the thumb. This
zoom level might be the native zoom level for the document (block 420), or might be the
prior level to which the zoom had been set by the user (or by some other entity) before the
user clicked the thumb (block 422).
[0033] FIG. 5 shows an example process that may occur if the user clicks the navigation
bar at a location other than the thumb. At 502, the user clicks and holds a non-thumb (and
non-arrow) location in the navigation bar - e.g., anywhere on the track 112 shown in FIG.
1, other than on thumb 110. The location at which the user clicks corresponds to some
page in the document. For example, if the document contains 50 pages and the user clicks
halfway down the track, the location at which the user clicked may correspond to page 25.
(A system that implements the process of FIG. 5 may contain a mechanism to identify the
page that corresponds to a particular location on the navigation bar or on the track, in
response to the user's having clicked that location on the track.) Thus, at 504, a flyout for
to that page may be shown. As in previous examples, the flyout may contain a thumbnail
of the page and/or the page number. At 506, the page corresponding to the location at
which the user clicked may be shown in the window at a full-page zoom level such that
the entire page fits in the viewing area. It is noted that different implementations may
exhibit different behaviors when the user clicks on a non-thumb area of the navigation bar
- e.g., some implementations may show only a flyout, some implementations may only
display the corresponding page in the viewing area, some may show both, or some may
show some other information relating to the page.
[0034] At 508, the user may release the button that he or she is holding on the pointing
device. In response to the user's releasing the button, the flyout may disappear from the
screen, and the zoom level may resume to the level to which it was set before the user
clicked the button. The page that is shown after the user releases the button may be
different in different implementations. In one example implementation, the act of clicking
on a non-thumb area of the navigation bar might not reposition the current page, in which
case the page that is shown after the user releases the button is whatever page was the
current page before the user clicked on a non-thumb area of the navigation bar (at 510).
Or, in another example implementation, clicking on a non-thumb area of the navigation
bar may reposition the page (either by repositioning to the page at the corresponding
location of the navigation bar, or by moving the current page toward that position for as
long as the user continues to hold the button on the pointing device), in which case the
page that will be viewed after the user releases the button is whatever page is current as a
result of the repositioning (at 512).
[0035] FIG. 6 shows an example environment in which aspects of the subject matter
described herein may be deployed.
[0036] Computer 600 includes one or more processors 602 and one or more data
remembrance components 604. Processor(s) 602 are typically microprocessors, such as
those found in a personal desktop or laptop computer, a server, a handheld computer, or
another kind of computing device. Data remembrance component(s) 604 are components
that are capable of storing data for either the short or long term. Examples of data
remembrance component(s) 604 include hard disks, removable disks (including optical
and magnetic disks), volatile and non-volatile random-access memory (RAM), read-only
memory (ROM), flash memory, magnetic tape, etc. Data remembrance component(s) are
examples of computer-readable (or machine-readable) storage media. Computer 600 may
comprise, or be associated with, display 612, which may be a cathode ray tube (CRT)
monitor, a liquid crystal display (LCD) monitor, or any other type of monitor. Computer
600 may also comprise, or be associated with, a pointing device 614, such as a mouse,
track ball, track pad, touch screen, etc. The pointing device may providing the ability to
move a cursor or arrow around a screen, and may also have one or more buttons (e.g., left
and right buttons on a typical device) which can be separately clicked and to which
different meanings are ascribed.
[0037] Software may be stored in the data remembrance component(s) 604, and may
execute on the one or more processor(s) 602. An example of such software is glancing
and navigation software 606, which may implement some or all of the functionality
described above in connection with FIGS. 1-5, although any type of software could be
used. Software 606 may be implemented, for example, through one or more components,
which may be components in a distributed system, separate files, separate functions,
separate objects, separate lines of code, etc. A computer (e.g., personal computer, server
computer, handheld computer, etc.) in which a program is stored on hard disk, loaded into
RAM, and executed on the computer's processor(s) typifies the scenario depicted in FIG.
6, although the subject matter described herein is not limited to this example.
[0038] The subject matter described herein can be implemented as software that is
stored in one or more of the data remembrance component(s) 604 and that executes on one
or more of the processor(s) 602. As another example, the subject matter can be
implemented as instructions that are stored on one or more computer-readable (or
machine-readable) storage media. Tangible media, such as an optical disks or magnetic
disks, are examples of storage media. The instructions may exist on non-transitory media.
Instructions can be stored on computer-readable memories; it will be understood that such
memories are physical objects (e.g., semi-conductor memories, disks that exist on tangible
platters, tapes), and are not merely wires that carry ephemeral or propagating signals.
(However, it will also be understood that those media that are characterized as "storage
media" are not mere carriers of ephemeral or propagating signals, but rather are media
where data is durably stored.) Such instructions, when executed by a computer or other
machine, may cause the computer or other machine to perform one or more acts of a
method. The instructions to perform the acts could be stored on one medium, or could be
spread out across plural media, so that the instructions might appear collectively on the
one or more computer-readable storage media, regardless of whether all of the instructions
happen to be on the same medium. It is noted that there is a distinction between media on
which signals are "stored" (which may be referred to as "storage media"), and - in
contradistinction - media that transmit propagating signals. DVDs, flash memory,
magnetic disks, etc., are examples of storage media. On the other hand, wires or fibers on
which signals exist ephemerally are examples of transitory signal media.
[0039] Additionally, any acts described herein (whether or not shown in a diagram) may
be performed by a processor (e.g., one or more of processors 602) as part of a method.
Thus, if the acts A, B, and C are described herein, then a method may be performed that
comprises the acts of A, B, and C. Moreover, if the acts of A, B, and C are described
herein, then a method may be performed that comprises using a processor to perform the
acts of A, B, and C.
[0040] In one example environment, computer 600 may be communicatively connected
to one or more other devices through network 608. Computer 610, which may be similar
in structure to computer 600, is an example of a device that can be connected to computer
600, although other types of devices may also be so connected.
[0041] It is noted that the claims herein may describe various items as being "distinct."
Two say that two things are distinct is to say that they are not the same instance of a given
thing (although the two distinct instances might be identical to each other). For example,
two pages may be described as being distinct, which is to say that they are not the same
page. E.g., in a 3-page document, page 1 is distinct from page 2 in the sense that they are
two separate pages. (Normally these two pages would contain different content, but they
would be distinct even if page 1 happened to contain a copy of the same content as page
2.) Similarly, locations may be described as distinct if they are not the same location -
e.g., a first location and a second location on a navigation bar are "distinct" if they refer to
non-identical spatial locations. Moreover, two zoom levels may be described as distinct if
they are not the same zoom level - e.g., 100% is a distinct zoom level from 200%.
Additionally, it is noted that in some cases the subject matter herein refers to items by the
labels "first", "second", "third", etc. It will be understood that, in a claim that defines a
"first page" and a "second page", the claim would cover situations where the first page
and the second page are the same page, and would also cover situations where they are
distinct pages, unless the claim specifies otherwise (e.g., by referring to the first page and
the second page as being "distinct", or as being "the same"). In some cases, an
independent claim might cover both situations by virtue of its silence as to whether the
pages are "distinct" or "the same", but a dependent claim might limit the first and second
pages to being "distinct", in which case the pages would be limited to being distinct for the
purpose of the dependent claim, but not for the independent claim.
[0042] Although the subject matter has been described in language specific to structural
features and/or methodological acts, it is to be understood that the subject matter defined
in the appended claims is not necessarily limited to the specific features or acts described
above. Rather, the specific features and acts described above are disclosed as example
forms of implementing the claims.
CLAIMS
1. A method of displaying a document, the method comprising:
displaying a first page of a document at a first zoom level in a viewing area;
first determining that a user is holding a thumb of a navigation bar that is displayed
with said document;
based on said first determining, displaying, in said viewing area, said first page at a
second zoom level that is distinct from said first zoom level;
second determining that said user has moved said thumb from a first location in a
track of said navigation bar to a second location in said track that is distinct from said first
location;
third determining that said user has released said thumb; and
based on said third determining, displaying, in said viewing area and at said first
zoom level, a second page that corresponds to said second location in said track.
2. The method of claim 1, further comprising:
based on said first determining, displaying a flyout that represents said first page,
wherein said flyout comprises a page number of said first page or a thumbnail of said first
page.
3. The method of claim 1, further comprising:
based on said first determining, displaying a flyout that represents said first page;
and
while said user is moving said thumb, changing said flyout to represent pages that
correspond to locations of said thumb in said track.
4. The method of claim 1, further comprising:
while said user is moving said thumb, changing a page that appears in said viewing
area to correspond to which page appears in said viewing area.
5. A computer-readable medium having computer-executable instructions to perform
the method of any of claims 1-4.
6. A device that displays a document, the device comprising:
a display;
a memory;
a processor; and
a component that is stored in said memory and that executes on said processor, that
displays a first page of a document in a viewing area on said display at a first zoom level,
that also displays, on said display, a navigation bar that comprises a track and a thumb in
said track, that receives input from a user indicating that said user is clicking and holding a
point on said track, that, in response to said user's clicking and holding said point on said
track, displays a second page of said document at a second zoom level that is distinct from
said first zoom level, that determines that said user has released said navigation bar, and
that, in response to said user's releasing of said navigation bar, displays a third page of
said document in said viewing area at said first zoom level, said second zoom level
allowing said first page or said second page to fit entirely within said viewing area.
7. The device of claim 6, wherein said component determines that said user is
clicking and holding a non-thumb area of said navigation bar and, in response to said
user's clicking and holding of said non-thumb area, identifies said second page to be a
page whose position in said document corresponds to said point, said second page being
distinct from said first page.
8. The device of claim 6, wherein said component determines that said user is
clicking and holding a non-thumb area of said navigation bar and, in response to said
user's clicking and holding of said non-thumb area, shows a flyout of said second page,
said second page being selected to be a page in said document whose position corresponds
to said point, said second page being distinct from said first page.
9. The device of claim 6, wherein said component determines that said user is
clicking and holding a non-thumb area of said navigation bar and, in response to said
user's clicking and holding of said non-thumb area, changes a current page of said
document to said second page, said second page being selected to be a page whose
location in said document corresponds to said point, said second page being distinct from
said first page, said third page being the same page as said second page.
10. The device of claim 6, wherein said component determines that said user is
clicking and holding a non-thumb area of said navigation bar and, in response to said
user's clicking and holding of said non-thumb area, identifies said second page to be a
page whose position in said document corresponds to said point and, when said user
releases said navigation bar, resumes displaying a place in said document at which said
user was viewing prior to clicking and holding, said second page being distinct from said
first page and from said third page, said first page being the same page as said third page.