I use my PC as a home theater pc so I have my display port connected to my 4K tv and an HDMI connect to my audio system for sound obviously. It has always defaulted to a multi screen setup in the past, however it never bothered me since it was always the same whether I was looking at the hdmi feed or the disport feed. Ever since I upgraded to windows 10 though if I have both the HDMI and the displayport connected the HDMI has screen one on it and the display port only carries screen two. Is there any way I can disable this feature? It really sucks I cant watch my 4K content.
From what I understand you would like to "Clone" (or Duplicate) the image on both your displays but currently they are in an "Extended" Mode.
If that is the case you can always watch the following guide on how to Rotate, Duplicate & Extend Multiple Displays in Catalyst Control Center: