diff --git a/demo/overview.c b/demo/overview.c
index 7ea75f9..b3f8822 100644
--- a/demo/overview.c
+++ b/demo/overview.c
@@ -36,9 +36,10 @@ overview(struct nk_context *ctx)
             static nk_size mprog = 60;
             static int mslider = 10;
             static int mcheck = nk_true;
-
             nk_menubar_begin(ctx);
-            nk_layout_row_begin(ctx, NK_STATIC, 25, 4);
+
+            /* menu #1 */
+            nk_layout_row_begin(ctx, NK_STATIC, 25, 5);
             nk_layout_row_push(ctx, 45);
             if (nk_menu_begin_label(ctx, "MENU", NK_TEXT_LEFT, nk_vec2(120, 200)))
             {
@@ -55,6 +56,59 @@ overview(struct nk_context *ctx)
                 nk_checkbox_label(ctx, "check", &check);
                 nk_menu_end(ctx);
             }
+            /* menu #2 */
+            nk_layout_row_push(ctx, 60);
+            if (nk_menu_begin_label(ctx, "ADVANCED", NK_TEXT_LEFT, nk_vec2(200, 600)))
+            {
+                enum menu_state {MENU_NONE,MENU_FILE, MENU_EDIT,MENU_VIEW,MENU_CHART};
+                static enum menu_state menu_state = MENU_NONE;
+                enum nk_collapse_states state;
+
+                state = (menu_state == MENU_FILE) ? NK_MAXIMIZED: NK_MINIMIZED;
+                if (nk_tree_state_push(ctx, NK_TREE_TAB, "FILE", &state)) {
+                    menu_state = MENU_FILE;
+                    nk_menu_item_label(ctx, "New", NK_TEXT_LEFT);
+                    nk_menu_item_label(ctx, "Open", NK_TEXT_LEFT);
+                    nk_menu_item_label(ctx, "Save", NK_TEXT_LEFT);
+                    nk_menu_item_label(ctx, "Close", NK_TEXT_LEFT);
+                    nk_menu_item_label(ctx, "Exit", NK_TEXT_LEFT);
+                    nk_tree_pop(ctx);
+                } else menu_state = (menu_state == MENU_FILE) ? MENU_NONE: menu_state;
+
+                state = (menu_state == MENU_EDIT) ? NK_MAXIMIZED: NK_MINIMIZED;
+                if (nk_tree_state_push(ctx, NK_TREE_TAB, "EDIT", &state)) {
+                    menu_state = MENU_EDIT;
+                    nk_menu_item_label(ctx, "Copy", NK_TEXT_LEFT);
+                    nk_menu_item_label(ctx, "Delete", NK_TEXT_LEFT);
+                    nk_menu_item_label(ctx, "Cut", NK_TEXT_LEFT);
+                    nk_menu_item_label(ctx, "Paste", NK_TEXT_LEFT);
+                    nk_tree_pop(ctx);
+                } else menu_state = (menu_state == MENU_EDIT) ? MENU_NONE: menu_state;
+
+                state = (menu_state == MENU_VIEW) ? NK_MAXIMIZED: NK_MINIMIZED;
+                if (nk_tree_state_push(ctx, NK_TREE_TAB, "VIEW", &state)) {
+                    menu_state = MENU_VIEW;
+                    nk_menu_item_label(ctx, "About", NK_TEXT_LEFT);
+                    nk_menu_item_label(ctx, "Options", NK_TEXT_LEFT);
+                    nk_menu_item_label(ctx, "Customize", NK_TEXT_LEFT);
+                    nk_tree_pop(ctx);
+                } else menu_state = (menu_state == MENU_VIEW) ? MENU_NONE: menu_state;
+
+                state = (menu_state == MENU_CHART) ? NK_MAXIMIZED: NK_MINIMIZED;
+                if (nk_tree_state_push(ctx, NK_TREE_TAB, "CHART", &state)) {
+                    size_t i = 0;
+                    const float values[]={26.0f,13.0f,30.0f,15.0f,25.0f,10.0f,20.0f,40.0f,12.0f,8.0f,22.0f,28.0f};
+                    menu_state = MENU_CHART;
+                    nk_layout_row_dynamic(ctx, 150, 1);
+                    nk_chart_begin(ctx, NK_CHART_COLUMN, LEN(values), 0, 50);
+                    for (i = 0; i < LEN(values); ++i)
+                        nk_chart_push(ctx, values[i]);
+                    nk_chart_end(ctx);
+                    nk_tree_pop(ctx);
+                } else menu_state = (menu_state == MENU_CHART) ? MENU_NONE: menu_state;
+                nk_menu_end(ctx);
+            }
+            /* menu widgets */
             nk_layout_row_push(ctx, 70);
             nk_progress(ctx, &mprog, 100, NK_MODIFIABLE);
             nk_slider_int(ctx, 0, &mslider, 16, 1);