Hi,

I want to create a time log sheet. This sheet has name of team
members, and 2 buttons.. Login and log out. On clicking log in the
=now() function should be called. "This should not change each time we
open the sheet, once the sheet is saved that value should remain."

On clicking log out the =now() should be called which should not be
changed. and based on the log in and log out time the duration logged
in should come up.

Please help me design this.

Thanks!!