Remember that if they are plain color images or if you want them to have a transparent background, they must be .png. On the other hand, if you are uploading photographs, we recommend the .jpg format.
We recommend using 204px*340px images.
Whenever you upload images, the modal will automatically convert to large size for this resolution.
We recommend using 342px*363px images.
Background image on mobile shows under background color on transparent layer.
Due to usability reasons, we do not recommend uploading images in mobile resolution, but if you want to do so, we recommend uploading images with low opacity, so that they blend in with the background color you have indicated and the texts are more readable.