You may have not noticed it, but it's the round, floating button in the lower right part of the display with a pen or plus icon, depending on whether you're on an Android phone or an iPhone.

the home “pill” icon and the back button, which appears when needed. However, according to some early Android Q code obtained by XDA Developers, the back button might not be around for the ...

Twitter's "favorite" button just got a makeover ... The new "heart" icon will be available on Twitter for iOS and Android, Twitter.com, TweetDeck, as well as the Vine Android app and website ...