What you need to know first: How to insert a Code or a Style.
(See also: End Style)
Codes Used: [es~E] [ee~E] where the E following the tilde is the Style name.
Keystroke: (None)
What do they do?
They indicate the beginning and end of a Style.
Usage in Duxbury:
[es~h1.]Chapter 1[ee~h1.]
Produces in Braille:
Chapter #a
Let us explain!
The [es~h1.] indicates the beginning of the DBT h1. Style, which is effectively a main heading. [ee~h1.] indicates the end of the Style.