HTC Touch cruise User Manual page 215

To view the next or previous image
When viewing images in full screen, go to the next image by swiping your finger
across the screen from right to left. Go back to the previous image by swiping your
finger from left to right.
To zoom in or out of an image
While viewing an image, make a full-circle gesture on the screen with your finger.
Slide your finger clockwise on an area to
zoom in on that area.
Experiencing Multimedia 15
Slide your finger counterclockwise to
zoom out.