I work with spreadsheets with many tabs, and it would be nice if I could see
only groupings of tabs at the bottom...and then do something like double
click on a grouping to see all the tabs. Example: tabs a,b,c,...1,2,3...;
but on the bottom I would only see folder tabs "alphabet" and "numbers"...and
then I could double click on one of them to see the sub-tabs. Is this
possible?