diff --git a/brush.h b/brush.h
index 70de08f8..0f02b187 100644
--- a/brush.h
+++ b/brush.h
@@ -22,17 +22,72 @@
 #ifndef __BRUSH_H_
 #define __BRUSH_H_
 
+/*!
+    Gets the brush from the picture.
+    @param Debut_X left edge coordinate in the picture
+    @param Debut_Y upper edge coordinate in the picture
+    @param Fin_X right edge coordinate in the picture
+    @param Fin_Y bottom edge coordinate in the picture
+    @param effacement If 1, the area is also cleared from the picture.
+*/
 void Capturer_brosse(short Debut_X,short Debut_Y,short Fin_X,short Fin_Y,short Effacement);
+
+/*!
+  Rotates the brush to the right.
+*/
 void Rotate_90_deg(void);
+
+/*!
+    Stretch the brush to fit the given rectangle.
+*/
 void Etirer_brosse(short X1, short Y1, short X2, short Y2);
+
+/*!
+    Stretch the brush to fit the given rectangle.
+    Uses fast approximation for the preview while drawing the rectangle on screen.
+*/
 void Etirer_brosse_preview(short X1, short Y1, short X2, short Y2);
+
+/*!
+    Rotates the brush to the right from the given angle.
+*/
 void Tourner_brosse(float Angle);
+
+/*!
+    Stretch the brush to fit the given rectangle.
+    Uses fast approximation for the preview while changing the angle.
+*/
 void Tourner_brosse_preview(float Angle);
 
+/*!
+    Remap the brush palette to the nearest color in the picture one.
+    Used when switching to the spare page.
+*/
 void Remap_brosse(void);
+
+/*!
+    Get color indexes used by the brush.
+*/
 void Get_colors_from_brush(void);
+
+/*!
+    Outline the brush, add 1 foreground-colored pixel on the edges.
+    Edges are detected considering the backcolor as transparent.
+*/
 void Outline_brush(void);
+
+/*!
+    Nibble the brush, remove 1 pixel on the edges and make it transparent (ie filled with back color).
+    Edges are detected considering the backcolor as transparent.
+*/
 void Nibble_brush(void);
+
+/*!
+    Get brush from picture according to a freehand form.
+    @param Vertices number of points in the freehand form
+    @param Points array of points coordinates
+    @param Effacement If set to 1, the captured area is also cleared from the picture.
+*/
 void Capturer_brosse_au_lasso(int Vertices, short * Points,short Effacement);
 
 #endif
diff --git a/clavier.h b/clavier.h
index 78a22afd..42414df2 100644
--- a/clavier.h
+++ b/clavier.h
@@ -20,9 +20,35 @@
     59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
 
+/*!
+  Convert an SDL keysym to an ANSI/ASCII character.
+  @param Sym SDL symbol to convert
+*/
 word Conversion_ANSI(SDL_keysym Sym);
+
+/*!
+  Convert an SDL keysym to an internal keycode number.
+  This is needed because SDL tends to split the information across the unicode sym, the regular sym, and the raw keycode.
+  We also need to differenciate 1 (keypad) and 1 (regular keyboard), and some other things.
+  @param Sym SDL symbol to convert
+*/
 word Conversion_Touche(SDL_keysym Sym);
+
+/*!
+    Helper function to convert between SDL system and old coding for keycodes. This is needed because some SDL keycode are actually unicode and won't fit in 8 bits.
+  @param scancode Scancode to convert
+*/
 word Touche_pour_scancode(word scancode);
+
+/*!
+    Returns key name in a string. Used to display them in the helpscreens and in the keymapper window.
+  @param Touche keycode of the key to translate, including modifiers
+*/
 const char * Nom_touche(word Touche);
+
+/*!
+  Gets the modifiers in our format from the SDL_Mod information.
+  @param Mod SDL modifiers state
+*/
 word Modificateurs_Touche(SDLMod Mod);