I have a player who is Quadriplegic who cannot "right-click" on dice rolls for advantage and has trouble scrolling on the Character Sheet.

Just an FYI to development in case they are thinking of updating the Character Sheet UI for Accessibility. 

His reply:

I’m kind of an edge case. I do have trouble right-clicking, so it just takes me a bit longer to mark advantage— I used an on-screen keyboard for this so I need to click control first then click the target. Would be nice if there was an alternate way to mark advantage. I sometimes have trouble with scrollable areas inside of a scrollable page as it creates a nested scrolling situation. But also as a UI designer I can see why they did that there. I don't like how the scrollbar is styled to be very thin and hard to grab in Chrome, but also I just remembered I can apply some user styles with the Chrome extension to override that. (Firefox, which I also use, doesn't suffer from that problem because its scrollbars are less customizable, which in my case is good.) You don't need to read all of this, but I'm just going to put it here as a footnote lol.

• https://blakewatson.com/journal/use-your-mac-the-way-i-do-a-thought-experiment/,
• https://blakewatson.com/journal/neglecting-the-scrollbar-a-costly-trend-in-ui-design/