Use this window to view and process a purchase order 
change order. You can use a change order to register, to keep track of and to authorize changes that you want to make to a purchase 
order that is released and has not yet been closed. A purchase order can have 
only one change order in an active state such as Planned, Released, 
Authorized 
at a given time. A purchase order change order 
consists of a header and one or more order lines similar to a purchase order.
Note:  The right mouse button option Project Connections will be disabled when the 
Enforce Use of Purchase Order Change Orders check box is enabled on the 
Sites/Sales tab and on the Procurement tab, and any changes to the project connections need to be done through the purchase order line. 
For the description of each tab in the window, follow the appropriate link: Part Order Lines, No Part Order Lines, Rental Part Order Lines, Charges, Miscellaneous Order Info, Authorization.
Handle purchase order change order
Cancel purchase order change order
Add or modify purchase order change order line
Cancel 
order lines on purchase order change order
Undo cancellation of order lines on purchase order change order
Authorize purchase order 
or purchase order changes
Change purchase order change order back to planned
Release purchase order change order
Update purchase order with registered changes
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