diff --git a/src/const.h b/src/const.h
index a70a4b04..e4f9c7e2 100644
--- a/src/const.h
+++ b/src/const.h
@@ -540,6 +540,8 @@ enum SPECIAL_ACTIONS
   SPECIAL_FORMAT_CHECKER_MENU,
 
   SPECIAL_HOLD_PAN,
+  SPECIAL_ZOOM_IN_MORE,
+  SPECIAL_ZOOM_OUT_MORE,
   
   NB_SPECIAL_SHORTCUTS            ///< Number of special shortcuts
 };
diff --git a/src/engine.c b/src/engine.c
index 10ea9548..81716117 100644
--- a/src/engine.c
+++ b/src/engine.c
@@ -1036,10 +1036,19 @@ void Main_handler(void)
                 Zoom(+1);
                 action++;
                 break;
+              case SPECIAL_ZOOM_IN_MORE :
+                Zoom(+3);
+                action++;
+                break;
               case SPECIAL_ZOOM_OUT : // Zoom out
                 Zoom(-1);
                 action++;
                 break;
+              case SPECIAL_ZOOM_OUT_MORE :
+                Zoom(-3);
+                action++;
+                break;
+
               case SPECIAL_CENTER_ATTACHMENT : // Center brush attachment
                 Hide_cursor();
                 Brush_offset_X=(Brush_width>>1);
diff --git a/src/helpfile.h b/src/helpfile.h
index 38031dc0..6ce3bf85 100644
--- a/src/helpfile.h
+++ b/src/helpfile.h
@@ -225,7 +225,9 @@ static const T_Help_table helptable_help[] =
   HELP_LINK ("  Toggle:            %s",   0x100+BUTTON_MAGNIFIER)
   HELP_LINK ("  Zoom factor menu:  %s",   0x200+BUTTON_MAGNIFIER)
   HELP_LINK ("  Zoom in:           %s",   SPECIAL_ZOOM_IN)
+  HELP_LINK ("  Zoom in more:      %s",   SPECIAL_ZOOM_IN_MORE)
   HELP_LINK ("  Zoom out:          %s",   SPECIAL_ZOOM_OUT)
+  HELP_LINK ("  Zoom out more:     %s",   SPECIAL_ZOOM_OUT_MORE)
   HELP_LINK ("  1:1 (off)          %s",   SPECIAL_ZOOM_1)
   HELP_LINK ("  2:1                %s",   SPECIAL_ZOOM_2)
   HELP_LINK ("  3:1                %s",   SPECIAL_ZOOM_3)
@@ -1966,7 +1968,9 @@ static const T_Help_table helptable_magnifier[] =
   HELP_TEXT ("window. If you're already in magnifier mode,")
   HELP_TEXT ("you'll return to normal mode.")
   HELP_LINK ("Zoom in : %s",SPECIAL_ZOOM_IN)
+  HELP_LINK ("Zoom in more : %s",SPECIAL_ZOOM_IN_MORE)
   HELP_LINK ("Zoom out: %s",SPECIAL_ZOOM_OUT)
+  HELP_LINK ("Zoom out more : %s",SPECIAL_ZOOM_OUT_MORE)
   HELP_TEXT ("")
   HELP_BOLD ("RIGHT CLICK")
   HELP_LINK ("(Key:%s)",0x200+BUTTON_MAGNIFIER)
diff --git a/src/hotkeys.c b/src/hotkeys.c
index 6a26182a..ca8942ad 100644
--- a/src/hotkeys.c
+++ b/src/hotkeys.c
@@ -1823,6 +1823,22 @@ T_Key_config ConfigKey[NB_SHORTCUTS] = {
   SDLK_SPACE, // Space
 #endif
   0},
+  {209,
+  "Zoom in more",
+  "Increase magnifying factor more.",
+  "",
+  "",
+  true,
+  SDLK_KP_PLUS|MOD_SHIFT, // Shift++
+  KEY_MOUSEWHEELUP|MOD_SHIFT},
+  {210,
+  "Zoom out more",
+  "Increase magnifying factor more.",
+  "",
+  "",
+  true,
+  SDLK_KP_MINUS|MOD_SHIFT, // Shift+-
+  KEY_MOUSEWHEELDOWN|MOD_SHIFT},
 };
 
 word Ordering[NB_SHORTCUTS]=
@@ -2037,4 +2053,6 @@ word Ordering[NB_SHORTCUTS]=
   0x100+BUTTON_ANIM_NEXT_FRAME,
   0x100+BUTTON_ANIM_PLAY, // Unused at this time
   SPECIAL_HOLD_PAN,
+  SPECIAL_ZOOM_IN_MORE,             // Zoom in more
+  SPECIAL_ZOOM_OUT_MORE,            // Zoom out more
 };
diff --git a/src/hotkeys.h b/src/hotkeys.h
index d84f5344..c5eed94e 100644
--- a/src/hotkeys.h
+++ b/src/hotkeys.h
@@ -33,7 +33,7 @@
 #endif
 #include <SDL.h>
 
-#define NB_SHORTCUTS 210   ///< Number of actions that can have a key combination associated to it.
+#define NB_SHORTCUTS 212   ///< Number of actions that can have a key combination associated to it.
 
 /*** Types definitions and structs ***/