When you need to know when a change was made to an Employee's timesheet entry, or which user was the one who made the changes, this info can be found in the Timesheet History menu.
To the right of a timesheet entry, click the 3 dots to open the Timesheet menu. At the bottom of this menu is the History link.
By clicking on 'History', you can view a popup window detailing who made any changes to an entry, and when they were made.
NB: Any timesheet entry that has been edited by an Employee and needs approval will show in bold on the Timesheet.