To make sure that the layout of your Peer-to-peer Website is correctly displayed, please use the correct formats/sizes of the images.
A free online tool to crop your images: https://www.iloveimg.com/crop-image
When creating a new purpose to raise money for, you need two different images, a Cover and a Header image.
1 a) Cover image 640 x 420px
1 b) Cover image Large (only used if this purpose is featured on the portal page = most recently added) 1440 x 620px
2 a) Header image 1440 x 620px
2 b) Header Image Mobile (Optional) 640 x 270px
This is only used if you want to use a different image or a resized version of it. If you leave this field empty, it automatically takes the normal Header Image.