Using The Optical Joystick As The Shutter Release; Review Screen - HTC Desire User Manual

Using the optical joystick as the shutter release

The optical joystick works as the shutter release for the camera. Press
the optical joystick to take a photo or begin capturing video. Press it
again to stop capturing video.

Review screen

After capturing a photo or video, the Review screen will display the
photo or the starting image of the video that you have just captured.
You can tap the onscreen buttons to delete the photo or video, view it
in the Photos application, or share it.
Back
Return to the Viewfinder screen.
Delete
Delete the captured photo or video.
Share
Send the captured photo or video to another phone or your computer
using Bluetooth, send it by email, or select a social network where you
want to upload it to.
View
Open and use the Photos application to view the captured photo or
video, rotate your captured photo, and more. See the Photos chapter
for details.
Camera 1