Xtra-PC is set up so that it will automatically pick the best resolution for your monitor. However, there are times when you may want to change your monitor resolution and refresh rate.
To do this, go to the Start menu (the blue X in the lower left corner), then “Local Administration,” then “Monitor Settings.” A “Display Settings” window will appear. Select your desired Resolution and/or Refresh Rate, then click “Apply.”
To make your manually selected monitor settings permanent, be sure to click the “Save” button after clicking the “Apply” button.
Video demonstrating opening and using the Monitor Settings application :