Acting is reacting.
One of the best ways to give feedback is to use stamps. These sticky reactions allow you to let others know what you like, don't like, or what needs review.

Inserting a stamp

To insert a stamp, click the
icon in the canvas toolbar. Then you can select your stamp and drop it where you'd like.
Inserting a stamp
Stamps available

Resizing a stamp

You can resize any stamp by holding shift and dragging to increase or decrease the size.

Removing stamps

You can select a stamp and press backspace to delete it.