Unable to center the screen on Big screen e.g Desktop or laptop

[Tapesh]

Hi Im trying to center the screen but I'm not able to do it, even I tried with if the screen.size small property but there are errors.  Here is a screenshot of my screen and im trying to make this center on only on deskop and laptop by decreasing the width size. 

Can anyone please let me know how? 

[rohsh354]

Hello,

Please try changing the screen settings and check if this helps.

Link: https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/create-responsive-layout