There's an easier way, as we are doing something that requires the same sort of recalculation of the font size world.
Use the 'option'() mnemonic to change the "StdFont" for the current PC. You may also need to change the 'font'() and set new values for your 'GF' and/or 'DF'.
Some Nomads variables to check are:
- 'XChar and %Nomad_XChar
To prevent too much flickering, you may want to position the current window WAY off the screen with 'option'("XYPos",...), do the changes, and then reposition it back to where you want it.