You can choose a preferred resolution quality ranging from 1080p to 1680p on the DirectVR page of the vorpX menu. To get the most out of this feature also check the “Custom Resolutions” section of the vorpX help. It explains how to add resolutions to your PC that it normally cannot display.
BTW: Please help keeping the forum in a usable state for yourself and others by posting in the appropriate sub-forum. Thanks! All your posts so far would fit better in the “Technical Support” sub-forum.