Perhaps this will be useful for Windows users:
You can right-click on the console title bar (when starting your program), select properties and change the font size (or other properties) on the font tab. This will be remembered for future sessions.
To change the size of the console, the cmd.exe "/k mode con: cols=150 lines=50" console cmd.exe "/k mode con: cols=150 lines=50" launched from the command (it does not work with Qt for me, changing COMSPEC does nothing).
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