The Canvas Is Read-Only
If everything is read-only, you're probably still recording.
Issue
Most actions on the canvas are read-only or unavailable.
Why It Happens
Most actions are read-only or unavailable while the recorder is running.
What to Do
If you can't complete any tasks, check whether the Recording in progress badge and the Stop recording buttons appear. If so, you're still recording.
Stop the recording, and then you can work on the canvas.