Installation question, how to install /boot on a different drive from the rest?

[J. Paul Bissonnette]

On Sat, 03 Apr 2021 13:25:00 +0100
Chris Green <cl at isbd.net> wrote:

> Is it possible to do this with the standard installer?
> 
> I need to install /boot on an old spinning hard disk but want
> everything else (i.e. the OS itself and probably /home as well) on a
> different drive.  Does the partitioning section of the standard
> installer allow one to do this?
> 

Yes: but why. /boot takes up only 200 - 250 mb?