Step 1
Click the menu icon in the top left of the screen and then select 'Display Settings & Tags'.
Step 2
Select your display, then click the pencil edit button.
Step 3
Uncheck the 'Use the screens native output resolution' checkbox.
Step 4
Set the resolution you want by using the width and height textboxes and then click the 'Apply' button.
Step 5
If your display is a video wall, you need to set the width and height to be the total resolution of your displays.
E.g. if you have three 1080x1920 screens side by side, you will need to set the resolution to 3240x1920.