Credit to this website: https://www.realvnc.com/en/connect/docs/raspberry-pi.html
You may want to do this if:
- Performance is impaired. A smaller screen resolution gives a more responsive experience.
- Your Raspberry Pi is headless (that is, not plugged into a monitor) and the default initial screen resolution is too small.
To change the resolution, run the command sudo raspi-config, navigate to Advanced Options > Resolution, and choose an option.
There are two modes displayed:
- CEA (Consumer Electronics Association) modes are intended for TV, they include plenty of interlaced and progressive modes, usually with 25/50/100Hz (PAL) or 30/60/120Hz (NTSC) frame rates and TV resolutions of 288/480/576/720/1080 scan lines.
- DMT (Display Monitor Timing) modes are intended for computer monitors, therefore there are none of the interlaced modes, the resolutions are 640/720/800/1024/1280 and the frame rates are compatible with the computer monitors, something like 60/70/75/80/85/120Hz.
