I don't know about any of the more modern Kindles (or equivalent) but my girl friend's Kindle can't handle PDFs very well either. She reads a lot of scientific

I don't know about any of the more modern Kindles (or equivalent) but my girl friend's Kindle can't handle PDFs very well either. She reads a lot of scientific journals, which seem to usually be written in columns, and the Kindle gives you the option of either seeing the left column and the left half of the right one, or just the right hand half of the right.