You could write to MS expressing your concern for a future version:




(include excel in the subject so that it gets to the correct group.)

Stephen Robb wrote:

Should be able to "stack" tabs in excel according to groups, hovering over
group name pops up the rest of the tabs in that group. This helps organize
large/extensize workbooks that have tons of tabs. All tabs/groups are layed
out in the same place that the current tab method is now.

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Dave Peterson