Allow time on archived/in-planning projects: Selecting this option allows the users to fill time entries against the Archived and In-Planning projects.
Allow overtime rates: Selecting this option allows the users to enter the overtime rates.
Auto approve time: If you select this option, then the time entries submitted by the users are automatically approved.
Show hours in decimal instead of HH:MM : If this option is selected, time will be displayed for example as 2.5 instead of 2:30. Applies to all hours like Timesheets, Est/Act. Hours etc.