Here are some advices to help you upload banner images for your Fundky platform:
Your image must be at least 1920 X 500 pixels. The download will not work if your image is smaller than these dimensions.
Your image must be in PNG or JPG format and not more than 3 MB.
Adapt your image
If you want to add text or know where to put the main information in this banner image (which is visible on computer and on mobile), it’s advisable to include the information with a 650 pixels indentation on each side and 70 pixels above and below.
So in a square of 620 pixels in width and 360 pixels in height:
How to add an image on the carousel of your platform?
For the steps to follow, see this article.