bug#43572: Feature request: make it possible to choose whether the first lines of the minibuffer should be displayed instead of the last ones

[Stefan Monnier]

>> This sounds like the same idea of a text property, only with an
>> overlay and a more complicated test for applicability.  When I said
>> "text property", I meant both text and overlay property, so if you
>> think your proposal above is less difficult/inconvenient, then using
>> just an overlay would be even simpler, no?  Or what am I missing?

My motivation was to solve the issue of finding the relevant overlay.
But yes, we could also just try and find "the overlay that covers point
and which has a non-nil `scroll-focus` property".  We'll just have to be
careful to properly handle the case where point is exactly at
`overlay-start` or `overlay-end`.


        Stefan