diff --git a/src/helpfile.h b/src/helpfile.h
index 474ceb2d..de677c68 100644
--- a/src/helpfile.h
+++ b/src/helpfile.h
@@ -2666,22 +2666,6 @@ static const T_Help_table helptable_palette[] =
   HELP_TEXT ("- \"+\" and \"-\": Allow you to lighten or")
   HELP_TEXT ("darken the current selection.")
   HELP_TEXT ("")
-  HELP_TEXT ("- Preset: Restores the predefined GrafX2")
-  HELP_TEXT ("palette.")
-  HELP_TEXT ("")
-  HELP_TEXT ("- Gray: Transforms the current selection")
-  HELP_TEXT ("into its gray-scaled equivalent.")
-  HELP_TEXT ("")
-  HELP_TEXT ("- Neg: Transforms the current selection")
-  HELP_TEXT ("into its reverse video equivalent.")
-  HELP_TEXT ("")
-  HELP_TEXT ("- Invert: Swaps the colors of the current")
-  HELP_TEXT ("selection so that the first colors become")
-  HELP_TEXT ("the last ones.")
-  HELP_TEXT ("")
-  HELP_TEXT ("- X-Invert: Works as above but modifies the")
-  HELP_TEXT ("picture so that it looks the same.")
-  HELP_TEXT ("")
   HELP_TEXT ("- Swap: Swaps the current selection with")
   HELP_TEXT ("another color-block. Click on the beginning")
   HELP_TEXT ("of the new color-block.")
@@ -2694,22 +2678,57 @@ static const T_Help_table helptable_palette[] =
   HELP_TEXT ("another color-block. Click on the beginning")
   HELP_TEXT ("of the new color-block.")
   HELP_TEXT ("")
+  HELP_TEXT ("- Histo: Opens a screen showing how much of")
+  HELP_TEXT ("each color is used in your image. Clicking a")
+  HELP_TEXT ("color selects it and closes the screen.")
+  HELP_TEXT ("")
+  HELP_TEXT ("- Flip: Swaps the colors of the current")
+  HELP_TEXT ("selection so that the first colors become")
+  HELP_TEXT ("the last ones.")
+  HELP_TEXT ("")
+  HELP_TEXT ("- X-Flip: Works as above but modifies the")
+  HELP_TEXT ("picture so that it looks the same.")
+  HELP_TEXT ("")
+  HELP_TEXT ("- Sort: Sorts the colors :")
+  HELP_TEXT ("  * Hue/Light : By H then L, in the HSL")
+  HELP_TEXT ("    color space.")
+  HELP_TEXT ("  * Lightness : By descending perceptual")
+  HELP_TEXT ("    lightness. The calculation is not the")
+  HELP_TEXT ("    same as the L of HSL space, it more")
+  HELP_TEXT ("    precisely represents how the human eye")
+  HELP_TEXT ("    find the color 'luminous'.")
+  HELP_TEXT ("  * Histogram : How much the color is used")
+  HELP_TEXT ("    in the image (descending)")
+  HELP_TEXT ("")
+  HELP_TEXT ("Note that you can choose a range of")
+  HELP_TEXT ("colors before sorting, and instead of the")
+  HELP_TEXT ("whole palette it will sort this range.")
+  HELP_TEXT ("")
+  HELP_TEXT ("- Used: Toggle small white indicators next")
+  HELP_TEXT ("to each color which are actually used, i.e.")
+  HELP_TEXT ("if there's at least one pixel of the image")
+  HELP_TEXT ("which is painted in this color.")
+  HELP_TEXT ("")
+  HELP_TEXT ("- Neg: Transforms the current selection")
+  HELP_TEXT ("into its reverse video equivalent.")
+  HELP_TEXT ("")
+  HELP_TEXT ("- Gray: Transforms the current selection")
+  HELP_TEXT ("into its gray-scaled equivalent.")
+  HELP_TEXT ("")
   HELP_TEXT ("- Spread: Computes a gradation between two")
   HELP_TEXT ("colors. If your selection is only made up of")
   HELP_TEXT ("one color, select the second color in the")
   HELP_TEXT ("palette. Otherwise, the two colors used will")
   HELP_TEXT ("be its extremities.")
   HELP_TEXT ("")
-  HELP_TEXT ("- Sort: sorts the palette by color ranges.")
-  HELP_TEXT ("If you click with the left mouse button, it")
-  HELP_TEXT ("will sort by H S L; and if you click with")
-  HELP_TEXT ("the right mouse button, it will sort by L")
-  HELP_TEXT ("only. Note that you can choose a range of")
-  HELP_TEXT ("colors before sorting, and instead of the")
-  HELP_TEXT ("whole palette it will sort this range.")
-  HELP_TEXT ("")
-  HELP_TEXT ("- Used: Indicates the number of colors used")
-  HELP_TEXT ("in the picture and opens a histogram screen.")
+  HELP_TEXT ("- Merge: The selected range of colors")
+  HELP_TEXT ("becomes an average, weighted according to")
+  HELP_TEXT ("how many pixels use this color. Then all the")
+  HELP_TEXT ("pixels get replaced by the first color of")
+  HELP_TEXT ("the range. This function is generally used")
+  HELP_TEXT ("on colors which are too similar, then you")
+  HELP_TEXT ("can recycle the unused palette entries, or")
+  HELP_TEXT ("use 'Reduce to - Unique' to clean up.")
   HELP_TEXT ("")
   HELP_TEXT ("- Zap unused: Erases the unused colors with")
   HELP_TEXT ("copies of the current selection. (The")
@@ -2750,11 +2769,6 @@ static const T_Help_table helptable_palette[] =
   HELP_TEXT ("the previous or next Forecolor (Backcolor if")
   HELP_TEXT ("you press <Shift> at the same time).")
   HELP_TEXT ("")
-  HELP_TEXT ("Warning! If you press Undo after an action")
-  HELP_TEXT ("that modifies the picture (X-Swap, X-Invert")
-  HELP_TEXT ("and Reduce colors), the picture won't be")
-  HELP_TEXT ("remapped as it was just before this action.")
-  HELP_TEXT ("Only Cancel will.")
   HELP_TEXT ("")
   HELP_TITLE("PALETTE OPTIONS")
   HELP_TEXT ("")