Approval settings can be changed by an Admin. Navigate to the Configure Approvals using the cog or gear icon in the top right.
Enable timesheet approval to allow users to submit their timesheet for approval.
Weekly or Monthly approvals
Approvals can be done either on a weekly or monthly basis. When you configured weekly approvals, users can request approval for their weekly timesheet. With monthly approval selected users can request approval for a whole month in one go.
Enable notification emails
Timesheet reviewers are notified by email of any new requests. In eHour, a badge is also shown in the menu to indicate the number of timesheet approvals still pending. If you do not need the email notifications you can disable them here.