Macros may be inserted into the name of any folder in the virtual file-system.
A common case where this may be useful is in setting the name of the home-folder
of Automatic Windows Users such that the
user-name matches the name of the folder that they see when they log in.
To do this, change the name of the 'MyDocuments' folder to '%UserName%'.
To see the available macros, click the ellipsis (i.e. "...") button next to
the name field in the folder properties panel. This shows a dialog containing a
text-box with a small button to its right. Clicking this small button shows a
list of the available macros.