To Enable Production Edit mode:
Production details Edit mode can be located in 2 ways From the Quote/Order Item view page.
1) Select the pencil icon from the Production Details section on the Quote/Order Item view page. This will enable edit mode. Select the desired production tab and edit as required.
Note: All Production tabs will become visible when Edit Mode enabled.
OR
2) Hover mouse over Actions and then select {Edit} from the drop-down. The page will refresh to the Edit Quote/Order Item page. Select the desired production tab and edit as required.
For more information on editing production details on an item: