When I scroll through a long list of emails, there are a couple of fine-tune interface adjustments I would recommend.
- First of all, enable "page up" and "page down"
- Leave a slight "overlap" when scrolling by "page". In other words, I should be able to recognize the top item after a page scroll as matching the bottom item before the page scroll. Otherwise I often think some of the content has passed without being reviewed.
- That problem is made worse in Airmail by a slight hiccup in the display on page scroll that leaves me thinking I have accidentally scrolled two pages. The action I see is 1) a full screen scroll immediately followed by 2) a much smaller jump.

All of this leaves me constantly uncertain of what has has actually transpired when scrolling through the email list.