-extern void focusnext(Arg *arg); /* focuses next visible client, arg is ignored */
-extern void focusprev(Arg *arg); /* focuses previous visible client, arg is ignored */
-extern void incnmaster(Arg *arg); /* increments nmaster with arg's index value */
-extern void initlayouts(void); /* initialize layout array */
-extern Client *nexttiled(Client *c); /* returns tiled successor of c */
-extern void resizemaster(Arg *arg); /* resizes the master percent with arg's index value */
-extern void restack(void); /* restores z layers of all clients */
-extern void setlayout(Arg *arg); /* sets layout, -1 toggles */
-extern void versatile(void); /* arranges all windows versatile */
+void arrange(void); /* arranges all windows depending on the layout in use */
+void focusnext(const char *arg); /* focuses next visible client */
+void focusprev(const char *arg); /* focuses prev visible client */
+const char *getsymbol(void); /* returns symbol of enabled layout */
+Bool isfloating(void); /* returns True if floating layout is enabled */
+Bool isarrange(void (*func)()); /* returns True if func is the layout function in use */
+void initlayouts(void); /* initialize layout array */
+void loaddwmprops(void); /* loads dwm properties */
+Client *nexttiled(Client *c); /* returns tiled successor of c */
+void restack(void); /* restores z layers of all clients */
+void savedwmprops(void); /* saves dwm properties */
+void setlayout(const char *arg); /* sets layout, NULL means next layout */
+void togglebar(const char *arg); /* shows/hides the bar */
+void togglemax(const char *arg); /* toggles maximization of floating client */