I'm converting a comic book to read on Koreader on my Kindle. I extracted the .cbr file into a folder containing the comic's images. The entire book is in landscape format. However, when converting to .epub or .mobi, the pages appear small when opened, as shown in the screenshot. I don’t know what else to do; I've tried everything.
https://photos.app.goo.gl/Kaar8jLYEnvpLbL4A