Assalamualaikum how r u ?? Ok so Im just teaching u all how to fit a cover the cover book
(Example)

(If u use ur yellow Colour for story read pls change it to white )

Step1:
Take a screenshot

Step2:
Crop it like this

Step3:
Put in on the cover box in the same condition u cropped it ,it will automatically come full

So I hope some people who didn't know that got it

rusher_jcat_3eek I hope it's easy for u now

Keep smiling and keep supporting

-bari67