Screen size

Hi!

Can someone help me why are there black bars on my left and right side of the screen?

My setting on "Fullscreen in broswer" is Letterbox scale. My Layout and Window size is 1920x1080. Should i increase my width? or change my fullscreen setting?

Thanks in advance!

See this tutorial:

construct.net/en/tutorials/supporting-multiple-screen-sizes-77

Most common method is "Scale outer" mode and making the background bigger.