Steven those are document level properties which can be different for each document. For new file you can update your part/assembly templates such that any new file made will have the required settings. For older one you can use macro to update the file quickly.
Also check the video drivers for your graphics card if that is appropriate with your installation of SOLIDWORKS.
Same problem here. Also noticed that opening an assembly or part on a different computer resets the image quality to "as low as possible", no matter what value the document had been saved on the first computer. Our template got saved with the slider just to the left of the border to the red area. Whenever we are opening this template, the quality is to the far bottom.