Tap-to-scroll or Page turning for a better UX / UI on e-ink display

Checklist

• I have used the search function to see if someone else has already submitted the same feature request.
• I will describe the problem with as much detail as possible.
• This issue only contains a request for one single feature, not multiple (related) features.

App version

6.400

Problem you are trying to solve

I use K-9 to read my e-mail on an e-ink tablet (Boox Max3) and an e-ink phone (Hisense A5).

Scrolling on an e-ink or e-paper display isn’t a great experience because it is slow, and leaves artifacts on the screen (like grey pixels remaining where black characters where printed)

Used to read my e-mails for years with a mutt client on GNU/Linux desktop, pressing space for viewing the next page is not a new thing, but with the lag of low fps display, it became a new necessity :-)

Suggested solution

Having a tap-to-scroll option for passing to the next page, like what you can find in pdf viewer (or basically any pager like more on *nix systems).

This gesture could to be complementary to the swipe to go to next/prev message.

Screenshots / Drawings / Technical details

Tap-to-scroll is exactly what it sounds like:

• By tapping on the right side (or bottom, or a button) of the screen, the page advances ~90%.
• By tapping on the left side (or top, or a button) of the screen, the page rewind ~90%.

Tap-to-scroll is useful to users on many devices beyond e-ink tablets. Some people enjoy it as a kind of page-turning function.

Indeed, this feature could be optional, disabled by default if community don't grok it.

No source file or test is named in the issue. Start by locating the Android message-reading screen and its gesture or paging entry points, then determine how tap zones can coexist with swipe navigation. Done means optional right/bottom taps advance about 90% and left/top taps rewind about 90%, with the behavior disabled by default if required.