I have never tried this, but you should be able to handle this manually by scaling the font relative to the screen size.
Here is how you set the font size (result would be your scaled value):
$('#m1-screen-textArea1').css('font-size',result + "px");
Here is how you get the window size:
h=window.screen.height;
w=window.screen.width;
Now all you need to do is write a Resize function and call it from your documentReadyHandler to scale your font accordingly. Hopefully this helps/works. Like I said, I have not actually tried to do this.