When you enter the information, Order Entry and Backorder All or By Stock Class appear in bold. Click 
to save your changes.
Order Entry Backorder All or By Stock Class Parameters
From the Parameter Editor window, double-click Order Entry.
Click Backorder All or By Stock Class.
Use these text boxes to enter backorder information.
Backorder All (Y)es, (N)o or (R)ange of Stock Classes
Backorder Stock Class Range From/To
Backorder Stock Class 01-05
When you enter the information, Order Entry and Backorder All or By Stock Class appear in bold. Click to save your changes.