Like the CV and TR getters, KR.CV, FADER, TELEXi ops and others, IN and PARAM are polling ops – they grab the ADC value only once when you execute the op, the “continuous” value of these inputs is not known. There is not really a way to display the current IN value, the best you can do is poll it by storing it to a variable in the metro script, in which case you can see its value get updated at metro rate.
The font is defined in a bit-packed format here, it has a fixed height where characters are 6 pixels tall. I imagine you could get a smaller typeface like 3x3 to work, though some alias symbols, like &, might be hard to render. This would probably require reworking everywhere in the Teletype code that draws text to the screen.
