I find the web font readable and love the fact that ProtonMail does not get totally screwed up if I enlarge the screen (ctrl+). If you've ever had to "reset" your browser due to uneven enlargement, you know what I am talking about! I am surprised that there is no "help" category called "accessibility." That said, maybe those of us affected could compile of list of tips and tricks we found useful. I personally just discovered keyboard shortcuts are turned on by default. This explains why emails disappear into thin air. Save yourself a headache and go turn that off! I find color reversal works great with PM but I am wondering about the variety in the themes offered with the paid versions. Most of Gmail's themes mess up my color reversal, if you have ever tried that. Thanks to PM for the simplicity.