V3 Can't change composite video mode

[oweno]

What OS version are you using? There was an update last month that fixes the composite video save settings problem:

New EYESY OS v3

There is a minor update to the EYESY OS. The latest v3.1 fixes a few problems: Allows more special characters in WiFi password. MIDI note off messages are recognized. This was leading to stuck notes for certain gear. Changes to composite videos settings are saved. Follow the steps in the manual to update: