HTC DROID Droid Incredible 2 User Manual page 235

Commenting photos in your social networks
Add comments to your uploaded photos as well as your friends'.
1. Do one of the following:
•
While browsing online albums, press and hold a photo and
then tap Add comment.
•
While viewing a photo in full screen, tap anywhere on the
screen, and then tap
. Tap the box that says "Write a comment".
. Enter your text, and then tap Comment.
Photos, videos, and music 
.