There are two ways to control the fonts on an MVX machine.

The first method is through the MVXOptions.ini file in the [Inkjet] area.

The second option is to use a passthrough event in your application:
SetEndorsementFont
Purpose: Set the endorsement font
Return:  True or false based on successful setting of the endorsement font
Parameters: none, but calling this will load a dialog box to allow the user to choose a font.
Example: CallPassthroughMethod("SetEndorsementFont()")

This will cause the Panini API to pop up a dialog box asking the user to input the font settings.