Choose the ribbon command Review | group Changes | Track changes 
in the open document that you want to revise.
The "Track changes" function is now enabled. All changes which you now make to the document will be tracked. (If you no longer need the "Track changes" function, you can disable it at any time by clicking on this command again.)
Note: Changes appear with your name (or only your initials) if you have entered something in the "Name" field (or only in the "Initials" field) in the User info. (For more information, see Settings, General tab). If nothing is entered here, TextMaker will now prompt you once for the current document.