Hello. I am using a linux machine. I tried so many ways to just simply zoom in pages and breaking them into multiple pages. This is how the pages look in my original pdf file.

I am using a Kindle Paperwhite 3 e-reader. I wish to zoom in to the pages and split each page into multiple pages so that the zoomed part fits the width and the screen. I have tried each mode but none of them worked as I intended it to be. Any ideas?
Thanks!