For most users, VHDL Mode will support their coding styles with
very little need for customizations. Usually, one of the standard
styles defined in vhdl-style-alist will do the trick. Sometimes,
one of the syntactic symbol offsets will need to be tweaked slightly, or
perhaps vhdl-basic-offset will need to be changed. However, some
styles require a more advanced ability for customization, and one of the
real strengths of VHDL Mode is that the syntactic analysis model
provides a very flexible framework for customizing indentation. This
allows you to perform special indentation calculations for situations
not handled by the mode directly.