Is there a way to undo a mistake when editing the slip comments?

My comments are usually quite detailed, and on numerous occasions I've accidentally deleted or pasted something that I would like to change, but, to my amazement, there is no ability to undo. Am I missing something?

Best,
Derek

+1 I think it would be a great time saver to have an Undo feature for slip edits. When a change has been undone, it would be nice to have a little notification somehow that X was reverted back to X or at least that a change has been undone and to which slip it was done.