I am trying to change the document library field but is having no
success.

The current set-up in the server is picking up for the column "name"
as the name of the document ie. P123.doc - p123 will show up.
however, I only want the title to show up - when I modified the
title - the name of the folder also disappear. Is there a way to set
the name of the folder under a different column instead of Name?