rst-preferred-adornments

rst-preferred-adornments is a variable defined in `rst.el'.
Its value is shown below.

Documentation:
Preferred hierarchy of section title adornments.

A list consisting of lists of the form (CHARACTER STYLE INDENT).
CHARACTER is the character used. STYLE is one of the symbols
`over-and-under' or `simple'. INDENT is an integer giving the
wanted indentation for STYLE `over-and-under'. CHARACTER and
STYLE are always used when a section adornment is described.
In other places, t instead of a list stands for a transition.

This sequence is consulted to offer a new adornment suggestion
when we rotate the underlines at the end of the existing
hierarchy of characters, or when there is no existing section
title in the file.

Set this to an empty list to use only the adornment found in the
file.

You can customize this variable.

Value:

((61 over-and-under 1)
 (61 simple 0)
 (45 simple 0)
 (126 simple 0)
 (43 simple 0)
 (96 simple 0)
 (35 simple 0)
 (64 simple 0))