Re: Question about (excessive?) ram usage when many overlays (with large vscroll)

[Po Lu]

dalanicolai <dalanicolai@gmail.com> writes:

> I have a question about this, namely: how to make a line the 'window
> start'?  Using 'set-window-start` does not work.
>
> From 'emacs -Q' (which starts within the scratch buffer), immediately
> evaluate
>
> (set-window-start nil (point))
>
> to set the 'new' window start. Subsequently do
>
> (set-window-vscroll nil 1)
>
> it will scroll from the start of the buffer, and not from the 'new'
> window start as I would expect

That's because the point is obscured after the vscroll is applied, so
the display is recentered.  You have to move point to some location that
is at least partially visible after the vscroll if you set
`make-cursor-line-fully-visible' to t, or a location that is fully
visible otherwise.