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, -1 toggles */
+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 */
void zoom(const char *arg); /* zooms the focused client to master area, arg is ignored */