Index: uspace/lib/display/include/disp_srv.h
===================================================================
--- uspace/lib/display/include/disp_srv.h	(revision edeee9ff19d63d97e85f6ecbd93e661f2b5ff66d)
+++ uspace/lib/display/include/disp_srv.h	(revision 9e9d9bc60978e9063a54b74c9301b5001d74660f)
@@ -1,4 +1,4 @@
 /*
- * Copyright (c) 2021 Jiri Svoboda
+ * Copyright (c) 2022 Jiri Svoboda
  * All rights reserved.
  *
@@ -62,5 +62,8 @@
 	errno_t (*window_move)(void *, sysarg_t, gfx_coord2_t *);
 	errno_t (*window_get_pos)(void *, sysarg_t, gfx_coord2_t *);
+	errno_t (*window_get_max_rect)(void *, sysarg_t, gfx_rect_t *);
 	errno_t (*window_resize)(void *, sysarg_t, gfx_coord2_t *, gfx_rect_t *);
+	errno_t (*window_maximize)(void *, sysarg_t);
+	errno_t (*window_unmaximize)(void *, sysarg_t);
 	errno_t (*window_set_cursor)(void *, sysarg_t, display_stock_cursor_t);
 	errno_t (*get_event)(void *, sysarg_t *, display_wnd_ev_t *);
Index: uspace/lib/display/include/display.h
===================================================================
--- uspace/lib/display/include/display.h	(revision edeee9ff19d63d97e85f6ecbd93e661f2b5ff66d)
+++ uspace/lib/display/include/display.h	(revision 9e9d9bc60978e9063a54b74c9301b5001d74660f)
@@ -1,4 +1,4 @@
 /*
- * Copyright (c) 2021 Jiri Svoboda
+ * Copyright (c) 2022 Jiri Svoboda
  * All rights reserved.
  *
@@ -59,6 +59,9 @@
 extern errno_t display_window_move(display_window_t *, gfx_coord2_t *);
 extern errno_t display_window_get_pos(display_window_t *, gfx_coord2_t *);
+extern errno_t display_window_get_max_rect(display_window_t *, gfx_rect_t *);
 extern errno_t display_window_resize(display_window_t *,
     gfx_coord2_t *, gfx_rect_t *);
+extern errno_t display_window_maximize(display_window_t *);
+extern errno_t display_window_unmaximize(display_window_t *);
 extern errno_t display_window_set_cursor(display_window_t *,
     display_stock_cursor_t);
Index: uspace/lib/display/include/ipc/display.h
===================================================================
--- uspace/lib/display/include/ipc/display.h	(revision edeee9ff19d63d97e85f6ecbd93e661f2b5ff66d)
+++ uspace/lib/display/include/ipc/display.h	(revision 9e9d9bc60978e9063a54b74c9301b5001d74660f)
@@ -1,4 +1,4 @@
 /*
- * Copyright (c) 2021 Jiri Svoboda
+ * Copyright (c) 2022 Jiri Svoboda
  * All rights reserved.
  *
@@ -42,10 +42,13 @@
 	DISPLAY_WINDOW_CREATE,
 	DISPLAY_WINDOW_DESTROY,
+	DISPLAY_WINDOW_MAXIMIZE,
 	DISPLAY_WINDOW_MOVE,
 	DISPLAY_WINDOW_MOVE_REQ,
 	DISPLAY_WINDOW_GET_POS,
+	DISPLAY_WINDOW_GET_MAX_RECT,
 	DISPLAY_WINDOW_RESIZE,
 	DISPLAY_WINDOW_RESIZE_REQ,
 	DISPLAY_WINDOW_SET_CURSOR,
+	DISPLAY_WINDOW_UNMAXIMIZE,
 	DISPLAY_GET_EVENT,
 	DISPLAY_GET_INFO
Index: uspace/lib/display/include/types/display/wndparams.h
===================================================================
--- uspace/lib/display/include/types/display/wndparams.h	(revision edeee9ff19d63d97e85f6ecbd93e661f2b5ff66d)
+++ uspace/lib/display/include/types/display/wndparams.h	(revision 9e9d9bc60978e9063a54b74c9301b5001d74660f)
@@ -1,4 +1,4 @@
 /*
- * Copyright (c) 2021 Jiri Svoboda
+ * Copyright (c) 2022 Jiri Svoboda
  * All rights reserved.
  *
@@ -43,5 +43,7 @@
 	wndf_popup = 0x1,
 	/** Set specific initial window position */
-	wndf_setpos = 0x2
+	wndf_setpos = 0x2,
+	/** Window is maximized */
+	wndf_maximized = 0x4
 } display_wnd_flags_t;