u/Ready-Recover9744

Hi,

I just started working in a location that has this old vending machine. I am trying to add text to the display; inside there is a Menu/options chart. It says, "Push red button then select 9 for message." but i can't figure out how to use the keypad shown in the image to add text and save it.

looking for

• greeting
• after purchase

any help would be greatly appreciated.