1 <?xml version="1.0" encoding="utf-8"?>

     2 <!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->

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     7     Nokia Corporation - initial contribution.

     8 Contributors: 

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    10 <!DOCTYPE concept

    11   PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

    12 <concept id="GUID-F25C17AC-BA88-4965-BAE8-AEF0E2EA66EC" xml:lang="en"><title>Zooming

    13 actions</title><shortdesc>Mobile device users must be able to zoom in and out consistently

    14 within applications on a mobile device. However the zooming actions may  differ

    15 from one device model to another.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

    16 <p>The product features and form factor of a mobile device determine which

    17 zooming actions application developers should make available on it: </p>

    18 <ul>

    19 <li><p>If the device has an ITU-T keypad, the asterisk (*) key zooms in and

    20 the hash mark (#) key zooms out. This functionality is not available in editors

    21 or other states where the keys play another role. In these cases, the zoom

    22 functions, if applicable, must be available in the <uicontrol>Options</uicontrol> menu. </p></li>

    23 <li><p>If the device has a QWERTY or half-QWERTY keyboard, use the two topmost

    24 keys at the top left of the keyboard for zooming in and out. For example,

    25 on a Latin keyboard, use the Q key to zoom in and the A key to zoom out. Some

    26 products might have zooming symbols printed on the keyboard to help users

    27 find the zooming features. Again, the functions are not available in editors.</p></li>

    28 <li><p>On touch devices, users can use touch stripes to zoom. Finger movement

    29 along the stripe controls zooming. Applications may support different number

    30 of zoom levels. It should be possible to zoom across the full range with one

    31 swipe.</p></li>

    32 <li><p>On touch devices with multi-touch support, users can use pinch zoom.

    33 See <xref href="GUID-17C64C2F-9426-4B41-9F0A-23060289D644.dita">Multi-touch</xref> section

    34 for more details on pinch in and pinch out.</p></li>

    35 <li><p>On touch devices, some applications may support double-tapping zoom.

    36 A double tap can toggle between zoomed and normal view, but this depends on

    37 the application.</p></li>

    38 </ul>

    39 </conbody></concept>