Please follow the below steps to reverse the transfer (contra) entry:
Step 2: Go to the relevant transaction -->> Click on the Cancel button.
Step 3: Enter the cancellation reason in the text box next to "Reason for canceling transfer".
Step 4: Click on the "Save" button.
Step 5: Once done, the Contra Transfer entry is reversed.
Note: Admin -> Bank & Cash -> Transfer page is refreshed. Under the comments column, you will find the cancellation reason along with the old comment.