Hi
so you could use the External display module.
that helps you to easily get it to full screen
you could use your second screen and set the resolution, then move the external display module to that window (or ATEM input) and put it to full screen
if you have a supported graphics card, then you can use the DeviceOuput feature, that has a separate resolution setting too, which is used for output rendering
if this might not be a good answer, maybe you could tell me what you are trying to do
![Smile :)](./images/smilies/icon_e_smile.gif)
but the things above might already work
i hope this helps you
cheers
christian