Look in the manual of your tv ! Or…look it up on internet ? You cán use AUTOMATIC setting bút sometimes the electronics choose a low setting instead of of a high setting ! Tip, test a few settings to look for the right one, thats also a nice way, eyes can see small differences !😃😍😎 You can start by checking the menu-text on your screen, you SEE changes when using 480P/720P/1080P. You should know if your country has 50Hz or 60Hz, although modern TV’s also except both ! In you TV-manual you can read what the definition and resolution ánd if it is i or p!