diff --git a/frontend/README-tcltk b/frontend/README-tcltk
index 27e8ca1a..b114b82f 100644
--- a/frontend/README-tcltk
+++ b/frontend/README-tcltk
@@ -65,7 +65,7 @@ So here is the output of  xorriso-tcltk --help :
 ------------------------------------------------------------------------
 
 Usage:
-  /usr/bin/xorriso-tcltk [options]
+  frontend/xorriso-tcltk [options]
 Options:
  All options must be given with two dashes ("--option") in
  order to distinguish them from any options of the Tcl shell.
@@ -105,9 +105,11 @@ Options:
      reply messages and enable this logging.
      The log lines will be appended. Path "-" means stderr.
  --script_log_file path
-     Set a file address for logging of major xorriso commands
-     and enable this logging.
+     Set a file address for logging of essential xorriso
+     commands and enable this logging.
      The log lines will be appended. Path "-" means stderr.
+ --script_log_all_commands
+     With logging of commands log non-essential commands too.
 
 If neither --stdio nor --named_pipes is given, then this script
 will try to locate itself in the filesystem and start a xorriso
diff --git a/frontend/xorriso-tcltk b/frontend/xorriso-tcltk
index 095eb51f..8664279d 100755
--- a/frontend/xorriso-tcltk
+++ b/frontend/xorriso-tcltk
@@ -21,7 +21,7 @@
 
 set own_version "1.2.7"
 
-# Minimum version of xorriso to be used as backend provess.
+# Minimum version of xorriso to be used as backend process.
 # Older versions of xorriso do not offer commands -msg_op and -launch_frontend
 set min_xorriso_version "1.2.6"
 
@@ -68,9 +68,11 @@ proc print_usage {argv0} {
   puts stderr "     reply messages and enable this logging."
   puts stderr "     The log lines will be appended. Path \"-\" means stderr."
   puts stderr " --script_log_file path"
-  puts stderr "     Set a file address for logging of major xorriso commands"
-  puts stderr "     and enable this logging."
+  puts stderr "     Set a file address for logging of essential xorriso"
+  puts stderr "     commands and enable this logging."
   puts stderr "     The log lines will be appended. Path \"-\" means stderr."
+  puts stderr " --script_log_all_commands"
+  puts stderr "     With logging of commands log non-essential commands too."
   puts stderr ""
   puts stderr "If neither --stdio nor --named_pipes is given, then this script"
   puts stderr "will try to locate itself in the filesystem and start a xorriso"
@@ -193,6 +195,9 @@ set cmd_log_target ""
 # Whether to log essential commands: 0=off , 1=no extract , 2=with extract
 set cmd_logging_mode 0
 
+# Whether to log all commands if cmd_logging_mode is 1: 0=off , 1=on
+set cmd_logging_all 0
+
 # The last logged -cd path. Used to prevent redundant logging of -cd.
 set recent_cd_path ""
 
@@ -240,6 +245,7 @@ proc send_async_cmd {cmd} {
   global cmd_sent cmd_conn debug_logging debug_log_conn
 
   display_busy 1
+  log_command $cmd 0
 
   debug_log_puts \
          "     =============================================================="
@@ -270,7 +276,7 @@ proc send_marked_cmd {cmd} {
 # Send a command and make it a candidate for the log script
 #
 proc send_loggable_cmd {cmd} {
-  log_command $cmd
+  log_command $cmd 1
   send_marked_cmd $cmd
 }
 
@@ -2006,7 +2012,7 @@ proc refresh_avail {} {
   set line "n.a."
   reset_highest_cmd_sev
   clear_sieve
-  send_marked_cmd "-tell_media_space"
+  send_loggable_cmd "-tell_media_space"
   if {[compare_sev $highest_cmd_sev "FAILURE"] < 0} {
     set ac ""
     read_sieve "After commit :"
@@ -3538,7 +3544,7 @@ proc init_gui {} {
 #
 proc init_input {} {
   global borderwidth busy_text_exists xorriso_version debug_logging
-  global cmd_logging_mode cmd_log_target osirrox_allowed
+  global cmd_logging_mode cmd_log_target osirrox_allowed cmd_logging_all
   global .input .input_line1 .xorriso_version .busy .busy_text
   global .refresh_state .end_button .cmdline .log_pipes_switch
 
@@ -3579,6 +3585,10 @@ proc init_input {} {
                      -command "effectuate_command_logging 0" \
                      -variable cmd_logging_mode \
                      -onvalue 1 -offvalue 0
+  $m add checkbutton -label "Log non-essential commands" \
+                     -indicatoron 1 -selectcolor "" \
+                     -variable cmd_logging_all \
+                     -onvalue 1 -offvalue 0
   $m add command     -label "Set log script address" \
                      -command "set_log_script_address"
   $m add separator
@@ -4539,6 +4549,10 @@ the xorriso state, but only those which set up that state and those which
 get sent via the \"Command:\" field.
 Commands -osirrox and -extract will be logged only as comments.
 
+The \"Log non-essential commands\" switch controls whether all commands
+shall be logged if \"Log command script\" is enabled. Commands
+-msg_op \"parse\" and -msg_op \"parse_bulk\" will be logged only as comments.
+
 The item \"Set log script address\" pops up a file tree browser window
 which asks for the target of appending to script. Address \"-\" means
 standard error. Else it must not yet exist or be a writable data file.
@@ -4815,6 +4829,9 @@ See xorriso command -stream_recording."
 burn a data file from hard disk onto the output drive.
 The address of the disk file is taken from the neighboring text field.
 
+No input drive may be aquired. (Delete all characters from the field
+\"Input drive/image\" and hit Return to give up the input drive.)
+
 The medium in the drive must be blank.
 
 (It is well possible to burn image files to appendable media. But the
@@ -5517,14 +5534,20 @@ proc yell_xorriso_tcltk {} {
 
 # Log a command (if enabled)
 #
-proc log_command {cmd} {
-  global cmd_log_conn cmd_logging_mode recent_cd_path
+proc log_command {cmd essential} {
+  global cmd_log_conn cmd_logging_mode cmd_logging_all recent_cd_path
 
   if {$cmd_logging_mode < 1} {return ""}
+  if {$essential <= 0} {
+    if {$cmd_logging_all <= 0} {return ""}
+  } else {
+    # Leave logging to non-essential call which will come soon after
+    if {$cmd_logging_all > 0} {return ""}
+  }
 
   if {[string first "-cd " $cmd] == 0} {
     set path [string range $cmd 4 end]
-    if {$path == $recent_cd_path} {return ""}
+    if {$path == $recent_cd_path && $cmd_logging_all <= 0} {return ""}
     set recent_cd_path $path
   }
 
@@ -5539,6 +5562,9 @@ proc log_command {cmd} {
       set prefix "# "
     }
   }
+  if {[string first "-msg_op parse" $cmd] != -1} {
+      set prefix "# "
+  }
   puts $cmd_log_conn $prefix$cmd
   flush $cmd_log_conn
 }
@@ -5713,7 +5739,7 @@ proc escape_newline {text backslash_too} {
 proc setup_by_args {argv0 argv} {
   global cmd_pipe_adr reply_pipe_adr main_window_geometry click_to_focus
   global have_bwidget cmd_conn reply_conn geometry stdout stdin
-  global osirrox_allowed
+  global osirrox_allowed cmd_logging_all
 
   # wish normally eats the -geometry option and puts the result into $geometry
   catch {set main_window_geometry $geometry}
@@ -5779,6 +5805,10 @@ proc setup_by_args {argv0 argv} {
       # postpone actual log start until start_xorriso has been passed
       set script_logging 1
     }
+    if {$opt == "--script_log_all_commands"} {
+      set ok "1"
+      set cmd_logging_all 1
+    }
     if {$opt == "--no_extract"} {
       set ok "1"
       set osirrox_allowed 0
diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index 656d6018..47fe8caf 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2013.01.14.094419"
+#define Xorriso_timestamP "2013.01.15.104804"