Requiring Coordinator Approval for Trades/Drops & Picking up Unassigned Shifts
On the SETTINGS>Global Helper Permissions page, the option to "Allow Trades With Coordinator Approval" gives you control as to whether or not changes go into effect only after Coordinator Approval.
If you have set Trades or Drop/Pickups to be "With Coordinator Approval"
Helpers normally cannot drop a shift unless another helper first agrees to pick it up (but you can let helpers unassign themselves from shifts on the SETTINGS>Global Helper Permissions page).
Example: John wants to drop a shift. He clicks on his shift and chooses to place it on the Tradeboard as a "drop". Jane sees his shift on the Tradeboard and clicks on the shift and agrees to pick up his shift. If you allow drops "At Will", the schedule would then reflect Jane as the helper for that shift. If you allow drops only with "Coordinator Approval", then the shift is removed from the Tradeboard and a pending trade request notification is sent to the Coordinator and is seen in the "What's New" section of the Coordinator Home Page.
Some Coordinators periodically review the Tradeboard and unassign or reassign shifts listed as drops.
Note that when a shift pick up will put a helper over their max hours per week, it will then be sent for Coordinator Approval.