Hi Oleg,
In the RoboTask window for Global User Variables, we have 2 columns: Name and Value (plus the great filter that you included recently). These are the only 2 fields available.
It would be great to have an additional field called "Comments" or "Remarks" or "Notes" or something like that where we can enter information about the variable. It might be for documentation purposes, or to remember about a temporary setting that needs to be undone, etc.
Kind regards,
Juanlu.