VMS Help DSR, DSR Commands, .INDENT, Parameters  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 n

    Specifies how many character positions to the right of the left
    margin setting the first line of text will begin.

 -n

    Specifies how many character positions to the left of the left
    margin setting the first line of text will begin. .INDENT cannot
    begin to the left of character position 0.