diff --git a/src/helpfile.h b/src/helpfile.h
index d73bc7a5..1b94bf57 100644
--- a/src/helpfile.h
+++ b/src/helpfile.h
@@ -2198,6 +2198,24 @@ static const T_Help_table helptable_save[] =
   HELP_TEXT ("")
   HELP_TEXT ("If the file already exists, a confirmation")
   HELP_TEXT ("box will appear.")
+  HELP_TEXT ("")
+  HELP_TEXT ("")
+  HELP_TITLE("THOMSON MO/TO FORMAT")
+  HELP_TEXT ("4 screen modes are supported :")
+  HELP_TEXT ("- 40col : 320x200x16colors with constraints")
+  HELP_TEXT ("- 80col : 640x200x2colors")
+  HELP_TEXT ("- bm16 : 160x200x16colors without constraint")
+  HELP_TEXT ("- bm4 : 320x200x4colors without constraint")
+  HELP_TEXT ("")
+  HELP_TEXT ("All four modes are only available on MO6,")
+  HELP_TEXT ("TO8, TO9, TO9+. Theses machines support a")
+  HELP_TEXT ("palette of 4096 color. As this palette is")
+  HELP_TEXT ("non-linear, make sure to check the")
+  HELP_TEXT ("\"MO6/TO8 palette gamma\" setting.")
+  HELP_TEXT ("")
+  HELP_TEXT ("The TO7, TO7/70 and MO5 only support the")
+  HELP_TEXT ("40col mode with 8 (TO7) or 16 (TO7/70 and")
+  HELP_TEXT ("MO5) colors.")
 };
 static const T_Help_table helptable_load[] =
 {
diff --git a/src/miscfileformats.c b/src/miscfileformats.c
index de7c3d94..9b03279a 100644
--- a/src/miscfileformats.c
+++ b/src/miscfileformats.c
@@ -5664,7 +5664,7 @@ static int Save_MOTO_window(enum MOTO_Machine_Type * machine, int * format, enum
     if (Is_shortcut(Key, 0x100+BUTTON_HELP))
     {
       Key = 0;
-      Window_help(BUTTON_SAVE, NULL);
+      Window_help(BUTTON_SAVE, "THOMSON MO/TO FORMAT");
     }
     else switch (button)
     {