[A] In order to cancel a particular document, go to the All Documents module.
[B] Search for the document that you have to cancel. Click on the document number to open it.
[C] Go to Other Actions(1). Click on Cancel(2).
[E] the document gets cancelled.
[F] You can open the document from the transaction module and follow the step [C]
Note: In order to cancel the document, there should not be any active document after this.
Keywords: cancel a document, cancelling document, cancellation