Windows fonts are allowable in textual regions with certain restrictions. Textual regions are by nature unscalable. Each character must occupy the same amount of space. Therefore, only fixed-width fonts are allowed in textual regions. The underline, bold, italic, and strikeout attributes are not allowed in textual regions. If you specify a font that is not allowed, it is replaced by the default font.

If the default font for your program is proportional, font "Esl Mono" is used in all textual regions.