Reasons why you may want to edit a gift:
•Assign all or a portion of a gift to an Appeal
•Add a memo to the gift
•Identify a gift as a personal gift or not Available on Web
•Change the date of a gift (for example, to move it to a different month for your tracking purposes)
Editing Gifts
1.Right-click on the gift you want to edit and select "Edit Gift".
2.Modify any of the information as desired (appeal, memo, personal gift, available on web, etc.).

Read More
Read More > Tutorial: Log gifts from an Appeal
Read More > Deleting Gifts
(Specifically, Why was a manually-entered gift automatically deleted by TntMPD?)