Note: For more information about this topic, see Undoing changes.
TextMaker has a very practical feature: With the command Undo 
in the Quick access toolbar, you can undo any number of the last changes made. If, for example, you format text in a different font and then don't like it, all you have to do is choose the command Undo and it will be undone again.
This not only works for formatting, but for virtually all text changes – for example, you can undo typing or the deletion of text.
The command Undo can be applied repeatedly if necessary. For example, you can choose it five times to reverse the last five changes.
By the way, there is also a counterpart to the command Undo: the command Redo 
in the Quick access toolbar. This restores the last action you undid. You can thus undo the cancellation of text changes.