Is there any format recommended for the background image when used in the Refined Theme JSD portal?
The usual web formats are supported, so .jpeg, .gif and .png. Make sure to select an image that is a little bigger than the average screen width of your users. That will make your theme look great on all different devices.
Don't make it too big and heavy to download though, it might affect your users experience when accessing the portal via poor broadband connections.
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