( CNN ) -- Twitter announced Wednesday that it 's adding new photo tagging and collage features . It 's no $ 2 billion purchase of a virtual-reality gaming company , but the update will have an impact on Twitter 's 241 million users who post to the service each month . The change lets you tag up to 10 people in one photo . Previously , you could work around Twitter 's lack of image tags by just mentioning people from the photo in the tweet itself . But with precious few characters to work with , that could gobble up a lot of tweet real estate , especially if you were taking crowded group selfies . Image tagging is not an original idea . Facebook has offered photo tagging features for a long time and Instagram added its own photo-tagging option last year . Twitter also is now making it possible to pack more images into messages with a new collage option that lets you share up to four photos in a single tweet . Select the images and it will tile them into a neat rectangle . Previously you would need a third-party app to make a collage . These are just the latest features to make the jump between major social networks , which happily borrow the most popular aspects of competing services . Last summer , Facebook copied one of Twitter 's best features when it added clickable hashtags to its newsfeed , and it tried to clone Snapchat with its Poke application . When Twitter added short , 6-second videos with its Vine service , Instagram quickly followed suit with 15-second videos . The new Twitter image tags wo n't count against a tweet 's 140-character limit . Any tagged images will pop up under the Interactions tab , just like regular tweets in which you are mentioned . Twitter is rolling out the new features to users starting with its Android and iPhone apps . Once you have the new powers , you can start identifying friends in images by selecting an image and then hitting the `` who 's in this photo ? '' link below it . If you 're not comfortable being tagged in images , immediately take a trip to the Twitter privacy settings . The default setting for the photo tagging is `` Allow anyone to tag me in photos . '' It can be changed so that only people you already follow can tag you , or it can be turned off completely . It 's also easy to untag yourself from any photos . Tap the three dots below the tweet and select `` Remove tag from photo . '' People who have their Twitter accounts set to private can only tag people who follow them , and the default privacy setting for protected accounts is to not allow people to tag them in images at all . If you 've blocked someone on Twitter , they can not tag you .
Twitter has added the ability to tag people in photos . The feature is already very familiar to Facebook users , who have had it a long time . The default privacy setting lets anyone tag you in an image , but it can be turned off . Comment: