By default, your uploads will be displayed on a solid blank background, centralised on the screen. However, there are advanced options in the upload process that allow you to customise how your Prevues display in fullscreen view.

By selecting 'Advanced Options' in the final step of your upload, you will be able to do the following:

1. Smart Background
   This feature takes a 1px width slice of your upload, and repeats it horizontally as your background. It's perfect for gradient backgrounds and repeating elements (like solid navigation backgrounds). In addition to that, your image will be displayed at the top centre of the browser.
    
2. Upload a background image
   If you have a specific image you'd like to use as a background, you can upload it here. This doesn't count towards your upload limit, but background images can only be a maximum of 1Mb in size.
    
3. Background colour
   If you'd like a background colour different to the default, simply choose it using the free text field, or handy colour selector.
    
4. Margins and repeats
   With the advanced tools, you also have complete flexibility over the position and repeat of background elements.

Once your Prevue is uploaded, you will be able to edit all of these items in Fullscreen view, find out more here.