Thanks, setting get_window().content_scale_size = DisplayServer.window_get_size() / 3 works! Now I only have to figure out what 3 stands for

And where should I put that? In a _reaay or a _process?

I did set the aspect to expand, but when I set the scaling mode to integer instead of fractional it adds the black bars

The problem is that the dongle I am using to connect the deck to my TV doesn’t have a USB port