Just for reference on the LCD Screen:
3.5" touch screen:
Part# MP13501
https://www.waveshare.com/3.5inch-rpi-lcd-a.htm
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Commands to terminal
sudo ./LCD35-show
/\ will turn the screen on every time powered on
sudo ./LCD-hdmi
/\ will turn off the LCD screen and revert back to HDMI
I've used a script from pihome with success to shrink RPi images:
https://github.com/mikerr/pihome/blob/master/resizeimage.pl