Jun 24, 2022, 16:14 by drew.adams@oracle.com:
> It is a different thing than that. I customarily using the `up' and
> `down' key to move through the collection of entries. Could there be
> some form of indicator (e.g. highlight, underline, some other means)
> that will tell me that is was selected as the default by the package
> designer? Currently I see no distinction, with all entries in
> collection as just an entry like any other.

Again, what's the use case? Why do you want the default to be singled
out in some way?

I'm curious too. I don't say it couldn't be useful,
but I wonder what the aim is.
Wouldn't one normally associate a default with some sensible setting worth looking
into most times?  Perhaps this could be a user setting. 

BTW, note that the default value (or even any of a
list of default values) provided need not be among
the candidates for completion, if completion is lax
(REQUIRE-MATCH = nil). E.g.:

(completing-read "q: " '("a" "b" "c" "d")
nil nil nil nil "e")