In the Credit Memo form you can have a custom message appear on the printed Credit Memo. This is a good way to enter a specific message about the selected Credit Memo. There will be one of two slightly different buttons displayed on the Credit Memo form depending if a message exists or not.
This button will appear if there are no messages entered for the selected customer credit memo. Clicking this button will open the Credit Memo Message form, which will allow you to enter a message for the selected customer Credit Memo. When you are done entering a message, click on the X button at the right hand corner to close the form and return to the customer Credit Memo form.
If this button is showing in place of the normal message button then it means there are existing messages for the current customer Credit Memo. Clicking this button will open the Credit Memo Message form displaying the previously entered message for the selected customer credit memo. When you are done editing or viewing that message, click on the X button at the right hand corner to close the form and to return to the customer Credit Memo form.