F&M supports a system font, which provides the character representations used within all forms, gadgets and menus which you define. This system font has variable width characters (referred to as VarChars), so different characters may have different widths. A notional character width is supported for the font. This is a sort of average width (usually the width of uppercase X), and provides a rough approximation to the width of a text string as number of characters multiplied by the notional width.

The recommended system font supports many of the World's character sets, so you can have a mix of different languages on the same form. In order to achieve this PML and F&M now use the Unicode standard as their internal character format.