Locking records
Select the Lock Edit checkbox to prevent accidental changes to a record after saving it. To make permanent changes, clear the Lock Edit checkbox and save the record.
You can find the Lock Edit checkbox in budgets, proposals, estimates, purchase orders, change orders, and subcontracts. In cases where a calculation is being performed, the calculation will include locked data, even though it cannot be edited.
Tip: Use the display properties to allow certain security groups the ability to clear the checkbox once a record is saved.