For this guide, we’ll use a Google Docs file, but the process is virtually the same for either a Sheets or Slides file.

Highlight some text, an image, cells, or slides, and then click the Add a Comment icon, located on the right of the page. Alternatively, press Ctrl+Alt+M (Windows/Chrome OS) or Cmd+Option+M (macOS) to insert a comment using the keyboard shortcut.

To add a comment to an image, it needs to be aligned “In line.” “Wrap Text” and “Break Text” disable the ability to add a comment.

Next, type a comment and include the collaborator’s email address—with “+” or “@” in front of it—that you want to assign the task to. A checkbox will appear. Click the box next to “Assign To” and then click the “Assign” button.

Tasks that are assigned will show to the right of the page in the comments section and specify who they’re assigned to. The collaborator will receive an email with a link to the document.

To reassign a task, click on the comment and then click on the “Reply” text field in the comment.

Type a comment while including the other collaborator’s email—with a “+” or “@” in front of it—and click the box next to “Reassign To” when the option appears. Click the “Reassign” button.

If you or the collaborator don’t receive an email notifying you of an assigned item, you can still check whether you have any waiting for you. Head to Google Drive and any file that has an awaiting task will have a number (of tasks) beside it.