For context, when uploading a background image, the minimum width should be 1425 pixels wide with at least a height of 680 pixels long. When pages become longer than this default size, the background image will automatically stretch/zoom to adapt. If this is not your preference, please continue reading!
Tip: Looking to create a seamless design? Read more in the "How to create a seamless-looking background" article.
PHOTOS:
To accommodate a longer page length, upload a photo with a longer height. (Think vertical portrait orientation that would fit better vs. a horizontal landscape that would stretch.)
In the example below, we show what a long photo background looks like when it's applied to a shorter page and then what happens when it's applied to a longer page. Please note here that no stretch/zoom happened because more of the bottom just gets revealed.
Note: Play around with cropping, it may take a few trial-and-error attempts to get it perfect.
GRAPHICS:
For backgrounds where you have the flexibility to adjust the graphics, simply further extend the height space to accommodate a longer page length. The actual graphics should stay at the same size scale.
In the example below, we show how a stretch/zoom occurs when the exported background isn't long enough, compared to when it's correctly exported.
