You can set a backdrop image for your strip:
the limitation is that you cannot upload just any image
it has to be a panel drawn by you or someone else on this site
For this tutorial we will use Electra 's Backgrounds strip
Under Strip Edit
Select Extra Tab
Page Backdrop Strip ID ←- this is the strip the backdrop is in
Image Index ←- order of the image in the strip (1 is the first)
Fixed Backdrop ←- set this to make the backdrop stretch onto the screen
You can get the Strip ID from either the header of the page:
or from the URL of your browser:
Image index is also simple:
Example settings:
Final result: