Your profile top image is displayed wide and large to give more visual design to your profile. We recommend that you upload large size and high quality photos to prevent any pixelation or blurriness, so your image should meet the minimum width & length requirements which is 1300px X 890px. As a default, the system will only show your available images that meet the minimum width & length requirements.
Simply click on EDIT SLIDESHOW button located under your username on your ViewBug Profile to get the selection pop-up. Once you select a photo you wish to feature, be sure to click on the blue "Continue" button located at the left bottom corner of the selection pop-up.
If you do not see the photos you wish to feature, that means those photos do not meet the minimum width & length requirements so you'll need to re-upload a higher resolution version.