I am having two issues with running directRT v.2016 .1.108 on a dell laptop windows 10

The first issue is that when I specify the screen size on DirectRT to match that of the laptop (1920x1080) the stimuli is never in the center and seems more towards the right side corner of the screen.

If I revert it back to the screen size at 1024X768 the whole image would show but still not at the center. The only way I was able to get it to the center was by changing the laptop display to 1024x768 but that created a black boarder which is distracting.

The second issue has to do with the background color, I chose white as the background color but I got green instead and I still can't get the stimuli to play on a white background