Tagent undo?

Is there a way to undo a move of a tangent? Right now, it seems like ctrl+Z doesn’t respond. I’ve messed up a few points like this without being able to undo it. Is there a work around or a solution to this?

Is there a way to undo a move of a tangent? Right now, it seems like ctrl+Z doesn’t respond. I’ve messed up a few points like this without being able to undo it. Is there a work around or a solution to this?