Free Friday! I'm going to go simple today.
I've always had a problem with PDFs and my phone. It always seems to involve stretching stuff around to make the print bigger and moving it all over the place to get it centered just right. Plus there's the horizontal thing, etc. I've been looking for a program to open PDFs in a reasonable manner for quite a while.
Yesterday my phone offered to open a PDF in Google PDF reader. I didn't specifically have the reader on my phone, but it comes with my Google Suite, so I figured "Eh, why not try it? It certainly can't hurt."
Wow. This is one of the reasons that Google gets into your life and stays there. It's the PDF reader I'll be using on my phone from now on. I love it. It's perfectly centered and the print is legible in horizontal mode. I was able to scroll through a list of command lines and enter the right text into another computer without having to mess with my phone screen at all.
Give it a try! It's free and there are no ads.