static void tile(Monitor *m);
static void overview(Monitor *m);
static void grid(Monitor *m);
static void scroller(Monitor *m);
static void deck(Monitor *mon);
static void dwindle(Monitor *mon);
static void spiral(Monitor *mon);
static void monocle(Monitor *m);
static void vertical_tile(Monitor *m);
static void vertical_overview(Monitor *m);
static void vertical_grid(Monitor *m);
static void vertical_scroller(Monitor *m);
static void vertical_deck(Monitor *mon);
static void vertical_dwindle(Monitor *mon);
static void vertical_spiral(Monitor *mon);
static void vertical_monocle(Monitor *m);