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]

> I actually thought about putting the text property or overlay on the
> first character of the text inserted into the minibuffer,

I don't understand what data you intend to put this way.
The overlay I proposed carries fundamentally 2 pieces of info: the
beginning position and the end position of the "scroll focus".
So if it needs to cover the first char, you can't use `overlay-start` to
carry the first info.


        Stefan