This message was posted on behalf of Intel Corporation
Thank you very much for taking the time to reach the Intel® Communities Team.
I understand you would like to set a custom resolution for a virtual display.
Allow me to share with you that the Intel® HD Graphics properties will only be able to modify the settings of a physical monitor or display, a virtual display is handled by the Operating System. I will highly recommend you to get in touch with the support of your OS in order to change these settings.