The product features and form factor of a mobile device determine -which zooming actions application developers should make available -on it:
-If the device has an ITU-T keypad, the asterisk (*) key zooms
-in and the hash mark (#) key zooms out. This functionality is not
-available in editors or other states where the keys play another role.
-In these cases, the zoom functions, if applicable, must be available
-in the
If the device has a QWERTY or half-QWERTY keyboard, use the -two topmost keys at the top left of the keyboard for zooming in and -out. For example, on a Latin keyboard, use the Q key to zoom in and -the A key to zoom out. Some products might have zooming symbols printed -on the keyboard to help users find the zooming features. Again, the -functions are not available in editors.
On touch devices, users can use touch stripes to zoom. Finger -movement along the stripe controls zooming. Applications may support -different number of zoom levels. It should be possible to zoom across -the full range with one swipe.
On touch devices with multiple touch support, users can use
-pinch zoom. See
On touch devices, some applications may support double-tapping -zoom. A double tap can toggle between zoomed and normal view, but -this depends on the application.
The product features and form factor of a mobile device determine +which zooming actions application developers should make available +on it:
+If the device has an ITU-T keypad, the asterisk (*) key zooms
+in and the hash mark (#) key zooms out. This functionality is not
+available in editors or other states where the keys play another role.
+In these cases, the zoom functions, if applicable, must be available
+in the
If the device has a QWERTY or half-QWERTY keyboard, use the +two topmost keys at the top left of the keyboard for zooming in and +out. For example, on a Latin keyboard, use the Q key to zoom in and +the A key to zoom out. Some products might have zooming symbols printed +on the keyboard to help users find the zooming features. Again, the +functions are not available in editors.
On touch devices, users can use touch stripes to zoom. Finger +movement along the stripe controls zooming. Applications may support +different number of zoom levels. It should be possible to zoom across +the full range with one swipe.
On touch devices with multiple touch support, users can use
+pinch zoom. See
On touch devices, some applications may support double-tapping +zoom. A double tap can toggle between zoomed and normal view, but +this depends on the application.