diff --git a/include/labwc.h b/include/labwc.h
index 1d383d1f..9f728a00 100644
--- a/include/labwc.h
+++ b/include/labwc.h
@@ -309,6 +309,8 @@ struct output {
 	struct wlr_scene_buffer *workspace_osd;
 	struct wlr_box usable_area;
 
+	struct wl_list regions;  /* struct region.link */
+
 	struct lab_data_buffer *osd_buffer;
 
 	struct wl_listener destroy;
diff --git a/src/output.c b/src/output.c
index a43bc097..b30ba643 100644
--- a/src/output.c
+++ b/src/output.c
@@ -19,6 +19,7 @@
 #include "labwc.h"
 #include "layers.h"
 #include "node.h"
+#include "regions.h"
 #include "view.h"
 
 static void
@@ -40,6 +41,7 @@ static void
 output_destroy_notify(struct wl_listener *listener, void *data)
 {
 	struct output *output = wl_container_of(listener, output, destroy);
+	regions_destroy(&output->regions);
 	wl_list_remove(&output->link);
 	wl_list_remove(&output->frame.link);
 	wl_list_remove(&output->destroy.link);
@@ -148,6 +150,8 @@ new_output_notify(struct wl_listener *listener, void *data)
 	output->frame.notify = output_frame_notify;
 	wl_signal_add(&wlr_output->events.frame, &output->frame);
 
+	wl_list_init(&output->regions);
+
 	/*
 	 * Create layer-trees (background, bottom, top and overlay) and
 	 * a layer-popup-tree.
@@ -446,6 +450,7 @@ void
 output_update_usable_area(struct output *output)
 {
 	if (update_usable_area(output)) {
+		regions_update(output);
 		desktop_arrange_all_views(output->server);
 	}
 }
@@ -457,7 +462,12 @@ output_update_all_usable_areas(struct server *server, bool layout_changed)
 	struct output *output;
 
 	wl_list_for_each(output, &server->outputs, link) {
-		usable_area_changed |= update_usable_area(output);
+		if (update_usable_area(output)) {
+			usable_area_changed = true;
+			regions_update(output);
+		} else if (layout_changed) {
+			regions_update(output);
+		}
 	}
 	if (usable_area_changed || layout_changed) {
 		desktop_arrange_all_views(server);
diff --git a/src/regions.c b/src/regions.c
index 2b8ea87a..52d2c5d3 100644
--- a/src/regions.c
+++ b/src/regions.c
@@ -8,6 +8,7 @@
 #include <wlr/util/box.h>
 #include <wlr/util/log.h>
 #include "common/graphic-helpers.h"
+#include "common/list.h"
 #include "common/mem.h"
 #include "labwc.h"
 #include "regions.h"
@@ -27,7 +28,34 @@ regions_init(struct server *server, struct seat *seat)
 void
 regions_update(struct output *output)
 {
-	/* To be filled later */
+	assert(output);
+
+	struct region *region;
+	struct wlr_box usable = output_usable_area_in_layout_coords(output);
+
+	/* Initialize regions */
+	if (wl_list_empty(&output->regions)) {
+		wl_list_for_each(region, &rc.regions, link) {
+			struct region *region_new = znew(*region_new);
+			/* Create a copy */
+			region_new->name = xstrdup(region->name);
+			region_new->percentage = region->percentage;
+			wl_list_append(&output->regions, &region_new->link);
+		}
+	}
+
+	/* Update regions */
+	struct wlr_box *perc, *geo;
+	wl_list_for_each(region, &output->regions, link) {
+		geo = &region->geo;
+		perc = &region->percentage;
+		geo->x = usable.x + usable.width * perc->x / 100;
+		geo->y = usable.y + usable.height * perc->y / 100;
+		geo->width = usable.width * perc->width / 100;
+		geo->height = usable.height * perc->height / 100;
+		region->center.x = geo->x + geo->width / 2;
+		region->center.y = geo->y + geo->height / 2;
+	}
 }
 
 void