=item l subname
-List first window of lines from subroutine.
+List first window of lines from subroutine. I<subname> may
+be a variable which contains a code reference.
=item -
=item b subname [condition]
-Set a breakpoint at the first line of the named subroutine.
+Set a breakpoint at the first line of the named subroutine. I<subname> may
+be a variable which contains a code reference (in this case I<condition>
+is not supported).
=item b postpone subname [condition]