diff --git a/doc/simh_doc.doc b/doc/simh_doc.doc
index 8110488d..668f0830 100644
Binary files a/doc/simh_doc.doc and b/doc/simh_doc.doc differ
diff --git a/scp.c b/scp.c
index 28438b33..e1b5a68e 100644
--- a/scp.c
+++ b/scp.c
@@ -2019,10 +2019,15 @@ static const char simh_help2[] =
       " the ON command.\n"
       "4Enabling Error Traps\n"
       " Error trapping is enabled with:\n\n"
-      "++set on                   enable error traps\n"
+      "++set on {INHERIT|NOINHERIT}  enable error traps\n\n"
+      " By default, ON state is NOINHERIT which means that the scope of pending ON\n"
+      " actions is bound to the currently executing command file.  If INHERIT is\n"
+      " enabled, the currently defined ON actions are inherited by nested command\n"
+      " files that may be invoked.\n\n"
       "4Disabling Error Traps\n"
       " Error trapping is disabled with:\n\n"
-      "++set noon                 disable error traps\n"
+      "++set noon                    disable error traps\n\n"
+      " Disables error traps for the currently running command file.\n\n"
       "4ON\n"
       " To set the action(s) to take when a specific error status is returned by\n"
       " a command in the currently running do command file:\n\n"