The fastest way to move Project64 to your second monitor is by using standard Windows shortcuts while the game is running.
: Press Windows Key + Shift + Left Arrow or Right Arrow to instantly jump the fullscreen window to your adjacent monitor.
: Launch your ROM and press Alt + Enter or Esc to enter fullscreen mode.
Launch Project64; it should now open on that screen by default. Option 3: Plugin-Specific Settings
Most emulators, including Project64, default to the monitor Windows considers "Main." Right-click your desktop and select . Select the monitor you want to use for gaming. Scroll down and check the box "Make this my main display" .
: Some graphics plugins may not handle this shift correctly. In that case, try moving the windowed emulator to the second monitor first and then pressing Alt + Enter . Option 2: Set the Second Monitor as "Primary"