HP 850 - Manual (Page 25)

Chapter 2: Taking pictures and recording video clips 25
Using instant review
After you take a still picture, the active display shows the image
for several seconds in Instant Review while the image is being
saved to the memory card. You can delete the image during
Instant Review by pressing the Menu/OK button.
You can extend Instant Review by holding down the Shutter
button after you take the picture. You can also set how long
Instant Review is displayed or turn it off with the Instant Review
option in the Setup menu. For more information, see Instant
review on page 65.
You can also use Playback to review the images you have
taken. See Using playback on page 43.
Using the focus brackets
The two brackets in the middle of the active display screen
show the focus region for the picture you are taking or the
video clip you are recording. When you press the Shutter
button halfway down, the camera measures and then locks the
focus using this region. The focus brackets turn green when the
image is in focus and the camera can lock the focus, but turn
red when the camera is unable to focus.
If the focus brackets turn red, release the
Shutter button,
re-frame the subject for your picture or video clip, and then
press the Shutter button halfway down again. If the focus
brackets continue to turn red after several tries, the lighting may
be too low, or there may not be enough contrast in the focus
region. Try using Focus Lock . See Using focus lock on page 26.