How to create a standard 'message' on a custom invoice?

QuickUserLV

I have created a custom invoice and would like to include a standard message in the message section of all the invoices but it doesn't seem to allow be to type in anything. Does anyone know how to include a standard message in the message section at the bottom left of the invoices?

Greg_the_Geek

Click the down arrow by Customer message: and select New/Edit. 

Greg_the_Geek

Not in the Design Invoice Forms, from the Invoice itself.

Greg_the_Geek

Click the down arrow by Customer message: and select New/Edit. 

QuickUserLV

I'm in the "Business Actions" --> "Invoices and estimates" --> "Design Invoice Forms" drop downs. The custom invoice layout doesn't do anything when I do the down arrow.

Should I be in a different screen?

Greg_the_Geek

Not in the Design Invoice Forms, from the Invoice itself.