By default Teamstudio Undo only monitors changes in template files (*.ntf). If you open an application (*.nsf) with Undo, you see the following on your display
To maintain Notes application in the same way like templates, open the teamstudio.ini file in your notes data directory, locate the IncludeFiles= entry in the [Undo] section and append *.nsf separeted by a comma to the existing entry. ( IncludeFiles=*.ntf,*.nsf )
You need to restart the client for the changes to take effect.
Just to complete your post above, you can specify whole directories and individual databases to be watched by Undo too. Syntax is as you would expect using commas to separate multiple entries.
Full details on p264 of the User Guide. http://www.teamstudio.com/files/product-downloads/TSUG.pdf
If you want to watch *specific* NSFs on the server, the INI file entry would look like this:
IncludeFiles=*.ntf,CN=TSProd/O=Teamstudio!!SimonsUnpluggedExpense.nsf