For the script workspace, I found a way to add zoom controls, so with FIleMaker 14 and newer you can soon zoom:
The buttons zoom out, 100% and zoom in.
And for various calculation dialogs, we can apply a minimum font size:
So whenever the plugin formats the formula, it can apply a bigger font size than FileMaker does by default.
Especially for presentations it may be worth to install MBS Plugin and adjust sizes.