In Template Designer and Page Settings you can use your own images for backgrounds. Depending on your settings and screen resolution, we recommend the following image sizes as a guide:
Used as a background for folder icon view, we recommend using an image size: width 555 pixels, height 360 pixels
Width 2000 pixels, set height to tallest page of your site as the background will be cropped to fit the page height
Options: Repeat, Contain (Resizes the background image to make sure the image is fully visible), Center, Semi-Opaque (adds a semi opaque overlay on the image)
Note: if your menu and/or banner width is set to "Normal" the image width should be 1170 pixels.