To void a transaction, click once in the history window to select the item to be void, then use the Transactions > Void menu command.

Do not confuse the "Void" process with "Undo". The "Undo" process is used to forget the last completed action. An example of Undo is you enter a To Do item in the calendar. Then you realize that the item has already been completed. You could either delete the To Do, or simply undo it using the Edit > Undo menu command.

The void process is used in the event a transaction has not cleared your bank. The best example is, you receive a check from a friend which you deposit to your bank and record in the Budget program. A few days later, the bank informs you that the check was returned for insufficient funds. In this case you would find the transaction in the correct envelopes history window and void it.