dcl-margin-offset

dcl-margin-offset is a variable defined in `dcl-mode.el'.
Its value is

8

Documentation:
Indentation for the first command line in DCL.
The first command line in a file or after a SUBROUTINE statement is indented
this much. Other command lines are indented the same number of columns as
the preceding command line.
A command line is a line that starts with `$'.

You can customize this variable.