Why is the UMG viewport size 1920x1080 and not the actual screen size?

Hello, i was projecting to 2D some of the world position and used that to position UMG widgets, but they weren’t matching. After a few tries, i noticed that he always make the UMG viewport with 1920x1080 (i know i can adjust that on the Resolution tab in UMG) so i had to convert the screen coordinates to a scale of 1920x1080 using a hammered value of my current resolution. How can i avoid that? If it’s not possible and i have to convert it always, how do i get my current resolution? Usually i only got that on HUD Canvas Draw method. Thank you.