It would be helpful to be able to lock elements in place. Since the idea of a move has two different contexts--the Canvas and the Timeline--you actually need two locks.
This feature is necessary because it is way too easy to accidentally move something from one place to another--especially on the timeline.
This particular feature is being considered with the development team.
This post was from 3 years ago. Is it a feature yet?
When reviewing the scribe while still in the process of creating it, a little move here or there can screw up everything. I know how to work the camera settings, so that's not the point. Even moving the canvas. If there would be an option to LOCK the scribe until you Unlock it, would simply be like locking a layer in photoshop. So helpful, and save so much time!