TMGR: Only One Level of Undo on the Notebook Tab

SYMPTOMS

When you are editing text on the Notebook tab, the Undo feature will only undo the last action. For example, if you type a sentence and then click Undo Typing on the Edit menu, the entire sentence will be deleted. Additionally, after using the Undo command, the Undo command will remain available and the Redo command will not be enabled. If an item is undone by mistake, it can be recovered by clicking Undo Typing again.