[ghero]

What I will introduce is just a high level (abstract) procedure (without change the actual layout of each pdf pages), different people might achieve each step in different detailed ways. Also, it will be a little bit challenge to achieve what I will about to say (require to learn about a few new softwares), so it is rather a challenge, and it is not intended for non techie readers.

A key point:
Reading a cbr/cbz is much better than reading pdf on kobo glo. Because when you read as a pdf, there will always be an annoying toolbar at the bottom of the page, that you cannot get rid of. But when you are reading a cbr/cbz, you can read it in a clean screen with no toolbars. Which means you can read it in a slightly larger size. You will lose nothing by converting pdf to cbr/cbz for glo, because glo does not support text reflow for pdf, you will have no text processing feature to lose, because there is no any such features (for pdf).

High level procedure:

1. convert the PDF file to a bunch of image files (one file per each page).
2. crop each image file (to get rid of blank spaces, to further enlarge the display of actual text).
3. compose the image files into a cbr/cbz file.

end of procedure.

Note on step 1: You will need to use a software to do this. The one I am using is "Ap PDF to Image". Also, pay special attention to dpi settings (for converted images). If you set the dpi too small, then the converted image will be too fuzzy that makes you harder to read the words from it. If you set it too large, then you will increase the file size, and increase the processing time for kobo.

Note on step 2: You will need a software to do this, a software that is specialized to process massive picture files. The one I am using is a Chinese software, and I don't think there is a english version for it. So you will have to find one on your own and learn to use it.

Note on step 3: This step is actually quite easy. A small background knowledge: a cbz file is just a zip file (of images), with just the filename extension changed from zip to cbz. Similarly a cbr file is just a rar file (of images), with just the filename extension changed from rar to cbr. Basically what I do is just use winrar (can be any compression software of your choice) to package the images into a zip file, and then change the extension from zip to cbz.

So basically that's about it.