Beginning Tuesday, May 7: Chat in Docs and Slides will have a new look similar to what you’re used to in M+Google Mail. You will be able to start a group chat with just one click. Simply select the new chat button at the top right and a chat box will appear, making it easy for you to quickly message everyone who is working on the file. Additionally, if collaborators or viewers have an active Google+ profile, you will see their profile picture on top instead of just their name. This feature will be available in Sheets soon.