How do i get rid of the side bars?

Apr 30, 2018
37
48
Hello

Does anyone know why my images don't fill the space? I've started a new project at the recommended settings but i have these gray bars on either side of mt image. How do i get rid of them. Many thanks
 
Apr 30, 2018
37
48
thanks for the reply but if i set the pixel size to 1920x1080 the ratio comes out at 16:9 is that right? it looks to much like widescreen. Sorry total newbie to all this.

1569051924708.png 1569051975124.png