The default directory where directive values will be read from when using the <file notation. Default is config. The name is relative to the catalog directory unless preceded by a /.
This can be changed several times in the catalog.cfg file to pick up values from more than one directory. Another possibility is to use a Variable setting to use different templates based on a setting:
Variable TEMPLATE blue ParseVariables Yes ConfigDir templates/__TEMPLATE__ ParseVariables No Variable MENUBAR <menubar Variable LEFTSIDE <leftside Variable BOTTOM <bottom ConfigDir config
This will pick the templates/blue template. If TEMPLATE is set to red, it would read the variables from templates/red.