The drawing function is available from the mobile app, both iOS and Android. To access drawing, navigate on the mobile app to the image panes in a session, then tap on the pencil icon. From here you will see the drawing screen that allows you to select the size and color of the line, plus erasers etc. Once you are done, save your changes and your drawing will be an integrated part of the session report.

The drawing function is not available on the web app at this time.