A few notes about the latest modifications.
You select the fonts via mach3 iteslf and not the screen designer.
While there is a setting to select the colour of the font, this does not work. You will need to set the color via the screen designer.
To get rid of the box that contains the DROs, g-code display, and the tool path display, select toolpath in Mach3 settings and tick the box bottom right.
None of these changes will display until you restart Mach 3