I have an excel spreadsheet that a lot of employees use to enter data on tab
1. Tab 2 is used to graph the data. Is there any way to give a time limit to
default to tab 2?

Example: employee finshes entering data in tab 1 and goes back to work. 3
minutes after sitting idle the spreadsheet automatically switches back to tab
2.

I know this is a long shot but i thought i would throw it out there!