Input comment text size setting, especially when using full screen input comments

I'm currently developing Pc-Dmis programs to be used in production. We typically have operators that run parts on up to 4 cmms each - they're performing setup (no manual measurements), loading parts, following prompts and printing reports only. We utilize bar code / 2d matrix scanners, and when the operators have to enter data into an input comment either manually or with a scanner they cannot easily see the text that has been entered. We use full screen input boxes for user input. I do have some programs that have forms, but I am currently the only programmer at our facility that knows how to create them. Would it be possible to add a text size control (full formatting would be awesome, just like on the forum I'm using now) to input/comment dialog boxes?