Enable SSH
Host Name: pi4
telnet in
sudo raspi-config
https://retropie.org.uk/forum/topic/4183/how-to-edit-boot-config-txt
cd /boot
nano config.txt
Make the following changes
hdmi_group=1
hdmi_mode=16
This will set to 1080Â 60hz.
uncomment disable overscan.
https://www.reddit.com/r/RetroPie/comments/itp2lx/config_screen_font_size_is_too_small/