Shortcut: n

Add single or multi-line text notes to any drawing, wherever you want, and use them to fill in the title blocks as well. You have the ability to define the size of the text box as well as format the text itself and optionally include a leader or many leaders. You also have the ability to rotate the orientation of the note and create additional leaders.

Note that hovering over a note automatically causes a blue highlight on the edges attached to the leaders:

Example of blue lines caused by hovering