diff --git a/src/client.c b/src/client.c
index d45b24d..a4125f4 100644
--- a/src/client.c
+++ b/src/client.c
@@ -140,6 +140,8 @@ static inline void client_update_names(client_t *c) {
 }
 
 static inline void client_init_geometry(client_t *c) {
+  if (c->maximize || c->fullscreen) return;
+
   area_t workarea = c->monitor->workarea;
   if (c->geometry.x + client_width(c) > workarea.x + workarea.width) {
     c->geometry.x = workarea.x + workarea.width - client_width(c);
@@ -221,6 +223,7 @@ void client_manage(xcb_window_t window,
     } else {
       c->monitor = wm.current_monitor;
       c->tags = c->monitor->selected_tag->mask;
+      client_apply_rules(c, wm.rules, wm.rules_count);
     }
 
     client_init_geometry(c);
@@ -496,13 +499,22 @@ void client_unmanage(client_t *client) {
 }
 
 void client_apply_geometry(client_t *client, area_t geometry) {
-  if (client->geometry.x != geometry.x || client->geometry.y != geometry.y) {
-    client_move_to(client, geometry.x, geometry.y);
-  }
-  if (client->geometry.width != geometry.width ||
-      client->geometry.height != geometry.height) {
-    client_resize(client, geometry.width, geometry.height);
+  uint16_t mask = 0;
+  const xcb_params_configure_window_t params = {
+    .x = geometry.x,
+    .y = geometry.y,
+    .width = geometry.width,
+    .height = geometry.height,
+  };
+  if (client->geometry.x != geometry.x) mask |= XCB_CONFIG_WINDOW_X;
+  if (client->geometry.y != geometry.y) mask |= XCB_CONFIG_WINDOW_Y;
+  if (client->geometry.width != geometry.width) mask |= XCB_CONFIG_WINDOW_WIDTH;
+  if (client->geometry.height != geometry.height) {
+    mask |= XCB_CONFIG_WINDOW_HEIGHT;
   }
+
+  client->geometry = geometry;
+  xcb_aux_configure_window(wm.xcb_conn, client->window, mask, &params);
 }
 
 /**
@@ -527,6 +539,51 @@ void client_apply_workarea_geometry(client_t *client, area_t geometry) {
   client_apply_geometry(client, rect);
 }
 
+void client_apply_rules(client_t *client, const rule_t rules[],
+                        size_t rules_count) {
+  for (size_t i = 0; i < rules_count; i++) {
+    const rule_t *r = &rules[i];
+    if (!((!r->role || (client->role && strstr(client->role, r->role))) &&
+          (!r->class || (client->class && strstr(client->class, r->class))))) {
+      continue;
+    }
+
+    client->fullscreen = r->fullscreen;
+    client->maximize = r->maximize;
+    client->floating = r->floating;
+
+    for (monitor_t *m = wm.monitor_list; m; m = m->next) {
+      for (tag_t *t = m->tag_list; t; t = t->next) {
+        if (t->index != r->tag_index) continue;
+
+        client->monitor = m;
+        client->tags = t->mask;
+
+        if (r->switch_to_tag) {
+          wm.current_monitor = m;
+          m->selected_tag = t;
+
+          logger("++ switch to tag: %u\n", t->index);
+        }
+      }
+    }
+  }
+
+  if (client->fullscreen) {
+    xcb_change_property(wm.xcb_conn, XCB_PROP_MODE_REPLACE, client->window,
+                        _NET_WM_STATE, XCB_ATOM_ATOM, 32, 1,
+                        &_NET_WM_STATE_FULLSCREEN);
+  } else if (client->maximize) {
+    xcb_atom_t max_atoms[] = {
+      _NET_WM_STATE_MAXIMIZED_HORZ,
+      _NET_WM_STATE_MAXIMIZED_VERT,
+    };
+    xcb_change_property(wm.xcb_conn, XCB_PROP_MODE_REPLACE, client->window,
+                        _NET_WM_STATE, XCB_ATOM_ATOM, 32, countof(max_atoms),
+                        max_atoms);
+  }
+}
+
 void client_focus(client_t *client) {
   wm.client_focused = client;
   xwindow_focus(client ? client->window : XCB_WINDOW_NONE);
diff --git a/src/client.h b/src/client.h
index 0223b90..c77a437 100644
--- a/src/client.h
+++ b/src/client.h
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <stddef.h>
 #include <stdint.h>
 
 #include "color.h"
@@ -52,6 +53,8 @@ void client_kill(client_t *client);
 void client_unmanage(client_t *client);
 void client_apply_geometry(client_t *client, area_t geometry);
 void client_apply_workarea_geometry(client_t *client, area_t geometry);
+void client_apply_rules(client_t *client, const rule_t rules[],
+                        size_t rules_count);
 
 void client_focus(client_t *client);
 void client_stack_raise(client_t *client);
diff --git a/src/default_config.h b/src/default_config.h
index a2230d7..4da8af2 100644
--- a/src/default_config.h
+++ b/src/default_config.h
@@ -104,3 +104,11 @@ static const char *const autostart_list[] = {
   "fcitx5 -d",
   nullptr,
 };
+
+static const rule_t rules[] = {
+  {.role = "dialog", .tag_index = -1, .floating = true},
+  {.class = "firefox", .tag_index = 1, .maximize = true},
+  {.class = "Google-chrome", .tag_index = 1, .maximize = true},
+  {.class = "mpv", .tag_index = 3, .switch_to_tag = true, .fullscreen = true},
+  {.class = "Emacs", .tag_index = 10, .switch_to_tag = true, .maximize = true},
+};
diff --git a/src/event.c b/src/event.c
index 45e9497..ddba3e0 100644
--- a/src/event.c
+++ b/src/event.c
@@ -139,10 +139,22 @@ static void client_message(xcb_client_message_event_t *ev) {
     for (tag_t *t = c->monitor->tag_list; t; t = t->next) {
       if ((t->mask & c->tags) == 0) continue;
 
-      wm.current_monitor = c->monitor;
-      monitor_select_tag(c->monitor, t->mask);
-      client_focus(c);
-      return;
+      logger("== _NET_ACTIVE_WINDOW: %s[%u]\n", c->class, ev->data.data32[0]);
+
+      switch (ev->data.data32[0]) {
+        case 2: /* 来自 pager */
+          wm.current_monitor = c->monitor;
+          monitor_select_tag(c->monitor, t->mask);
+          client_focus(c);
+          break;
+        case 1: /* 来自应用程序 */
+          c->urgent = true;
+          monitor_draw_bar(c->monitor);
+          break;
+        case 0: /* 来自老版本标志 */
+        default:
+          break;
+      }
     }
   } else if (ev->type == _NET_WM_STATE) {
     /**
diff --git a/src/monitor.c b/src/monitor.c
index 9d21902..c43793e 100644
--- a/src/monitor.c
+++ b/src/monitor.c
@@ -69,12 +69,14 @@ void monitor_select_tag(monitor_t *monitor, uint32_t tag_mask) {
 
   for (task_in_tag_t *task = monitor->selected_tag->task_list; task;
        task = task->next) {
-    if (task->client->floating || task->client->size_freeze) {
+    if (task->client->floating || task->client->size_freeze ||
+        !monitor->selected_tag->layout->arrange) {
       task->geometry = task->client->geometry;
+      task->client->old_geometry = task->client->geometry;
     }
     if (task->client->fullscreen || task->client->maximize ||
         task->client->minimize) {
-      task->geometry = task->client->old_geometry;
+      task->geometry = task->client->geometry;
     }
   }
 
@@ -280,25 +282,24 @@ void monitor_arrange(monitor_t *monitor) {
   tag_t *tag = monitor->selected_tag;
   if (tag->layout && tag->layout->arrange) tag->layout->arrange(tag);
 
-  for (client_t *c = wm.client_list; c; c = c->next) {
-    if (c->monitor != monitor) continue;
+  for (client_t *c = wm.client_stack_list; c; c = c->stack_next) {
+    if (c->monitor != monitor || c->minimize) continue;
 
     task_in_tag_t *task = client_get_task_in_tag(c, tag);
     if (task) {
-      if (c->minimize) continue;
-      if (c->fullscreen) {
+      if (client_need_layout(c)) {
+        client_apply_geometry(c, task->geometry);
+      } else if (c->fullscreen) {
         client_apply_geometry(c, c->monitor->geometry);
       } else if (c->maximize) {
         client_apply_geometry(c, c->monitor->workarea);
       } else {
-        client_apply_geometry(c, task->geometry);
+        client_move_to(c, task->geometry.x, task->geometry.y);
       }
     } else {
       int16_t x = -client_width(c);
       int16_t y = -client_height(c);
-      if (x != c->geometry.x || y != c->geometry.y) {
-        client_move_to(c, x, y);
-      }
+      client_move_to(c, x, y);
     }
   }
   xcb_flush(wm.xcb_conn);
diff --git a/src/types.h b/src/types.h
index 2f09770..3938f88 100644
--- a/src/types.h
+++ b/src/types.h
@@ -100,3 +100,13 @@ typedef struct padding_t {
   uint16_t bar_y;
   uint16_t tag_x;
 } padding_t;
+
+typedef struct rule_t {
+  const char *role;
+  const char *class;
+  uint32_t tag_index;
+  bool switch_to_tag;
+  bool fullscreen;
+  bool maximize;
+  bool floating;
+} rule_t;
diff --git a/src/wm.c b/src/wm.c
index 51880a9..6fe42e3 100644
--- a/src/wm.c
+++ b/src/wm.c
@@ -338,6 +338,9 @@ static void wm_setup(void) {
   wm.layout_list = layout_list;
   wm.layout_count = (uint16_t)countof(layout_list);
 
+  wm.rules = rules;
+  wm.rules_count = countof(rules);
+
   wm_get_xres_config();
   wm_init_color_set();
 
diff --git a/src/wm.h b/src/wm.h
index b3a34f4..6fdaaec 100644
--- a/src/wm.h
+++ b/src/wm.h
@@ -27,6 +27,8 @@ typedef struct wm_t {
   char *font_family;
   uint32_t font_size;
   uint32_t dpi;
+  const rule_t *rules;
+  uint32_t rules_count;
 
   xcb_connection_t *xcb_conn;
   xcb_screen_t *screen;