by skouliki May 14th 2019, 1:23 pm
helloÂ
if you mean the homepage background body forum image then it dependsÂ
-if you want the image to repeated or to be fixed
-if you add the background image using CSS or if you add it through the admin panel
-if you want to add the image to fulfill the whole forum then you want a large one but it might look weird/stretched or hidden by the categoriesÂ
the best way is to add a medium size image style it using css so the image won't repeat or auto scale depending on screen size
examples you can find here
if you dont know how to view image dimensions just right click on the image and click "open image in a new tab"
the image will open in a new tab and you will see the dimensions on the tab's title