dired commands/vars i can't find

[Samuel Wales]

i can't seem to find a few things i want in dired that probably exist.


1.  suppose you run dired fro a file.  i beierve there is a setting
that will put point on that file's line insted of at top.  whatis it?

2.  also, i i clutter buffer space with dired dirs.  i thini you are
supposed to use a instead of ret when you vist from dired.
is there a dired-up-directory equivalent of this?  that is, i want a
version of dired-up-directory that reuse the current buffer.

thank you.  please to: me if you can.  or perhaps cc: will work as
well, idk.  [of course it is ok to include the mailing list.]