Windows – Displaying PDF Files White on Black

Only Adobe and Foxit (of those 5) have subpixel rendering. This is seen by zooming way in on the screenshot and seeing color fringing. This is because each pixel on an LCD display is made of 3 subpixels: red, green, and blue. These can provide extra resolution. Foxit maybe just doesn't have as good of a rendering method. Hinting could play a part.

The best way to remove margins is using pdfCropMargins https://pypi.org/project/pdfCropMargins/

install:

pip install pdfCropMargins --upgrade

Now we can use the command pdf-crop-margins to crop the pdf the way we want

I want to crop all the pages and then add 6bp margin all around. I can do that by

pdf-crop-margins -v -p 0 -a -6 input.pdf

-v : Verbose
-p : how much percentage of margin to be retained. We want the bounding box triming all the white margins on all sides. So say 0%
-a : Note: first -p is applied to create a bounding box. 
     IN this option it applies further on the bounding box after -p is applied. we can remove or add margin. Negative means add margin to the bounding box. So it will add 10bp all around after cliping

The output file is affixed with _cropped

Also I checked the cropped file and all the contents and links are intact.