Create a community cover image that is 2560 x 1440px. All main text, logos and primary subject matter should be centered within the center of the graphic (approximately 1282 x 896px). Save this image to your phone’s camera roll.
From the Communities tab, create a new community by tapping '+' at the top right corner or tap Create A Community at the bottom. If community already exists, tap the community you want to customize, scroll down and tap Admin Settings, then tap Create New Cover Image.
From the Add Cover Image screen, tap the Camera icon.
Select your design from camera roll and crop and scale if necessary.
Select None from the font list and the blank overlay option.