-extern void focusclient(const char *arg); /* focuses next(1)/previous(-1) visible client */
-extern void incmasterw(const char *arg); /* increments the master width with arg's index value */
-extern void incnmaster(const char *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 restack(void); /* restores z layers of all clients */
-extern void setlayout(const char *arg); /* sets layout, -1 toggles */
-extern void togglemax(const char *arg); /* toggles maximization of untiled client */
-extern void untile(void); /* arranges all windows untiled */
-extern void zoom(const char *arg); /* zooms the focused client to master area, arg is ignored */
+void arrange(void); /* arranges all windows depending on the layout in use */
+void focusclient(const char *arg); /* focuses next(1)/previous(-1) 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 */
+Client *nexttiled(Client *c); /* returns tiled successor of c */
+void restack(void); /* restores z layers of all clients */
+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 */