If you use Windows Terminal as console, please note that it does not permit to change console font size programmatically, so setting this property will have no effect.
console.font read/write property
Get or set the console font size, a number that represent the font size in pixels.
Example
-- old DOS like console
local console = require "console"
console.fullscreen = true
console.clear()
console.font = "Lucida Console"
console.fontsize = 16
console.write("Starting MS-DOS...\n\nHIMEM is testing extending memory...done.\n")
console.writeln("\nMODE prepare codepage function completed")
console.writeln("\nMODE select codepage function completed")
console.writeln("\n\nC:\\ \n\n\n")