Bb Annotate "undo" and “redo” Release

We are continuing to work on a fix for this issue.

We've paused the release of the new undo/redo capability in Bb Annotate due to an issue causing loss of information on comments. The root cause of it has been identified, and we'll communicate a new target date for the deployment in the following days. We're sorry for any inconvenience this may cause, as we understand this is a critical timing, and a critical tool for the grading process.