You can tag if you have facebook profile and go in your friend album and there u will see a tag option in his photo album use that option and tag photo to your any friend which are present in your friend list
note - this option may be not visible in mobiles phone
If you want to tag a picture of a friend on facebook. First step is go to the picture you want to tag. Then click tag picture then select the name of your friend that you want to tag and Click done.
tag means to tap someone.
Remove the tag. First, message them to remove the tag. If they do not, you can modify tags on your photos, or take down the photos and put them, back up. As a last resort, contact Facebook's Management Team.
add them to your friend list ;)
you would tag people in a picture, say if theres you and a friend in a picture and you can select their face in the picture and tag them with their name.
You tag your friends by putting their names on their photos. This is useful when there are several people in the pictures because it helps others know who you refer to.
Only if you leave a comment.
tag: it means that you can "tag" yourself in a photo of your latest trip or you can "tag" a photo of you with your best friend or grandchildren. Tagging a person means naming them in a photograph.
Simply click the untag link in all of the photos located in your friend's photo album.
putt @(friend name) example @mark zu
profile>upload photos
Photos which have name tag of the person in the picture that show on hover over (when you're mouse stand on them) che check out this http://www.crunchitech.com/category/tag-picture/