diff --git a/core/io/file_access_pack.cpp b/core/io/file_access_pack.cpp
index 58535ed3eaf5..c92fe27bc5d8 100644
--- a/core/io/file_access_pack.cpp
+++ b/core/io/file_access_pack.cpp
@@ -196,7 +196,7 @@ bool PackedSourcePCK::try_open_pack(const String &p_path, bool p_replace_files,
 	// Search for the header at the start offset - standalone PCK file.
 	f->seek(p_offset);
 	uint32_t magic = f->get_32();
-	if (magic == PACK_HEADER_MAGIC) {
+	if (magic == PACK_HEADER_MAGIC || magic == PACK_HEADER_ALTER) {
 		pck_header_found = true;
 	}
 
@@ -213,7 +213,7 @@ bool PackedSourcePCK::try_open_pack(const String &p_path, bool p_replace_files,
 			for (int i = 0; i < 8; i++) {
 				f->seek(pck_off);
 				magic = f->get_32();
-				if (magic == PACK_HEADER_MAGIC) {
+				if (magic == PACK_HEADER_MAGIC || magic == PACK_HEADER_ALTER) {
 #ifdef DEBUG_ENABLED
 					print_verbose("PCK header found in executable pck section, loading from offset 0x" + String::num_int64(pck_off - 4, 16));
 #endif
@@ -236,12 +236,12 @@ bool PackedSourcePCK::try_open_pack(const String &p_path, bool p_replace_files,
 		f->seek(f->get_position() - 4);
 		magic = f->get_32();
 
-		if (magic == PACK_HEADER_MAGIC) {
+		if (magic == PACK_HEADER_MAGIC || magic == PACK_HEADER_ALTER) {
 			f->seek(f->get_position() - 12);
 			uint64_t ds = f->get_64();
 			f->seek(f->get_position() - ds - 8);
 			magic = f->get_32();
-			if (magic == PACK_HEADER_MAGIC) {
+			if (magic == PACK_HEADER_MAGIC || magic == PACK_HEADER_ALTER) {
 #ifdef DEBUG_ENABLED
 				print_verbose("PCK header found at the end of executable, loading from offset 0x" + String::num_int64(f->get_position() - 4, 16));
 #endif
diff --git a/core/io/file_access_pack.h b/core/io/file_access_pack.h
index 1d7b59006bad..34c967e3d491 100644
--- a/core/io/file_access_pack.h
+++ b/core/io/file_access_pack.h
@@ -38,6 +38,7 @@
 
 // Godot's packed file magic header ("GDPC" in ASCII).
 #define PACK_HEADER_MAGIC 0x43504447
+#define PACK_HEADER_ALTER 0x25110501
 // The current packed file format version number.
 #define PACK_FORMAT_VERSION 2
 
diff --git a/core/io/pck_packer.cpp b/core/io/pck_packer.cpp
index 75870f09b956..17a40f7d3163 100644
--- a/core/io/pck_packer.cpp
+++ b/core/io/pck_packer.cpp
@@ -89,7 +89,7 @@ Error PCKPacker::pck_start(const String &p_pck_path, int p_alignment, const Stri
 
 	alignment = p_alignment;
 
-	file->store_32(PACK_HEADER_MAGIC);
+	file->store_32(PACK_HEADER_ALTER);
 	file->store_32(PACK_FORMAT_VERSION);
 	file->store_32(GODOT_VERSION_MAJOR);
 	file->store_32(GODOT_VERSION_MINOR);
diff --git a/editor/editor_main_screen.cpp b/editor/editor_main_screen.cpp
index fdd4615c33f6..5456620a8f81 100644
--- a/editor/editor_main_screen.cpp
+++ b/editor/editor_main_screen.cpp
@@ -156,7 +156,7 @@ void EditorMainScreen::select_by_name(const String &p_name) {
 	ERR_FAIL_COND(p_name.is_empty());
 
 	for (int i = 0; i < buttons.size(); i++) {
-		if (buttons[i]->get_text() == p_name) {
+		if (buttons[i]->get_name() == p_name) {
 			select(i);
 			return;
 		}
@@ -242,7 +242,8 @@ void EditorMainScreen::add_main_plugin(EditorPlugin *p_editor) {
 	tb->set_toggle_mode(true);
 	tb->set_theme_type_variation("MainScreenButton");
 	tb->set_name(p_editor->get_plugin_name());
-	tb->set_text(p_editor->get_plugin_name());
+	tb->set_tooltip_text(p_editor->get_plugin_name());
+	tb->set_icon_alignment(HORIZONTAL_ALIGNMENT_CENTER);
 
 	Ref<Texture2D> icon = p_editor->get_plugin_icon();
 	if (icon.is_null() && has_theme_icon(p_editor->get_plugin_name(), EditorStringName(EditorIcons))) {
diff --git a/editor/editor_node.cpp b/editor/editor_node.cpp
index 6b5cc484e4fd..b8d6735c4ebf 100644
--- a/editor/editor_node.cpp
+++ b/editor/editor_node.cpp
@@ -59,6 +59,7 @@
 #include "scene/gui/panel.h"
 #include "scene/gui/popup.h"
 #include "scene/gui/rich_text_label.h"
+#include "scene/gui/separator.h"
 #include "scene/gui/split_container.h"
 #include "scene/gui/tab_container.h"
 #include "scene/main/window.h"
@@ -3571,6 +3572,8 @@ int EditorNode::_next_unsaved_scene(bool p_valid_filename, int p_start) {
 }
 
 void EditorNode::_exit_editor(int p_exit_code) {
+	DisplayServer::get_singleton()->window_set_mode(DisplayServer::WINDOW_MODE_MINIMIZED);
+
 	exiting = true;
 	waiting_for_first_scan = false;
 	resource_preview->stop(); // Stop early to avoid crashes.
@@ -4814,7 +4817,7 @@ void EditorNode::_update_recent_scenes() {
 	recent_scenes->clear();
 
 	if (rc.size() == 0) {
-		recent_scenes->add_item(TTRC("No Recent Scenes"), -1);
+		recent_scenes->add_item(TTR("No Recent Scenes"), -1);
 		recent_scenes->set_item_disabled(-1, true);
 	} else {
 		String path;
@@ -7668,32 +7671,10 @@ EditorNode::EditorNode() {
 	top_split->set_v_size_flags(Control::SIZE_EXPAND_FILL);
 	top_split->set_collapsed(true);
 
-	VBoxContainer *srt = memnew(VBoxContainer);
-	srt->set_v_size_flags(Control::SIZE_EXPAND_FILL);
-	srt->add_theme_constant_override("separation", 0);
-	top_split->add_child(srt);
-
-	scene_tabs = memnew(EditorSceneTabs);
-	srt->add_child(scene_tabs);
-	scene_tabs->connect("tab_changed", callable_mp(this, &EditorNode::_set_current_scene));
-	scene_tabs->connect("tab_closed", callable_mp(this, &EditorNode::_scene_tab_closed));
-
-	distraction_free = memnew(Button);
-	distraction_free->set_theme_type_variation("FlatMenuButton");
-	ED_SHORTCUT_AND_COMMAND("editor/distraction_free_mode", TTRC("Distraction Free Mode"), KeyModifierMask::CTRL | KeyModifierMask::SHIFT | Key::F11);
-	ED_SHORTCUT_OVERRIDE("editor/distraction_free_mode", "macos", KeyModifierMask::META | KeyModifierMask::SHIFT | Key::D);
-	ED_SHORTCUT_AND_COMMAND("editor/toggle_last_opened_bottom_panel", TTRC("Toggle Last Opened Bottom Panel"), KeyModifierMask::CMD_OR_CTRL | Key::J);
-	distraction_free->set_shortcut(ED_GET_SHORTCUT("editor/distraction_free_mode"));
-	distraction_free->set_tooltip_text(TTRC("Toggle distraction-free mode."));
-	distraction_free->set_accessibility_name(TTRC("Distraction-free Mode"));
-	distraction_free->set_toggle_mode(true);
-	scene_tabs->add_extra_button(distraction_free);
-	distraction_free->connect(SceneStringName(pressed), callable_mp(this, &EditorNode::_toggle_distraction_free_mode));
-
 	editor_main_screen = memnew(EditorMainScreen);
 	editor_main_screen->set_custom_minimum_size(Size2(0, 80) * EDSCALE);
 	editor_main_screen->set_draw_behind_parent(true);
-	srt->add_child(editor_main_screen);
+	top_split->add_child(editor_main_screen);
 	editor_main_screen->set_v_size_flags(Control::SIZE_EXPAND_FILL);
 
 	scene_root = memnew(SubViewport);
@@ -7871,13 +7852,9 @@ EditorNode::EditorNode() {
 	ED_SHORTCUT_OVERRIDE("editor/quit_to_project_list", "macos", KeyModifierMask::META + KeyModifierMask::CTRL + KeyModifierMask::ALT + Key::Q);
 	project_menu->add_shortcut(ED_GET_SHORTCUT("editor/quit_to_project_list"), PROJECT_QUIT_TO_PROJECT_MANAGER, true);
 
-	// Spacer to center 2D / 3D / Script buttons.
-	left_spacer = memnew(HBoxContainer);
-	left_spacer->set_mouse_filter(Control::MOUSE_FILTER_PASS);
-	left_spacer->set_h_size_flags(Control::SIZE_EXPAND_FILL);
-	title_bar->add_child(left_spacer);
-
 	if (can_expand && global_menu) {
+		// Separator main_menu.
+		title_bar->add_child(memnew(VSeparator));
 		project_title = memnew(Label);
 		project_title->add_theme_font_override(SceneStringName(font), theme->get_font(SNAME("bold"), EditorStringName(EditorFonts)));
 		project_title->add_theme_font_size_override(SceneStringName(font_size), theme->get_font_size(SNAME("bold_size"), EditorStringName(EditorFonts)));
@@ -7885,15 +7862,9 @@ EditorNode::EditorNode() {
 		project_title->set_vertical_alignment(VERTICAL_ALIGNMENT_CENTER);
 		project_title->set_h_size_flags(Control::SIZE_EXPAND_FILL);
 		project_title->set_mouse_filter(Control::MOUSE_FILTER_PASS);
-		left_spacer->add_child(project_title);
+		title_bar->add_child(project_title);
 	}
 
-	HBoxContainer *main_editor_button_hb = memnew(HBoxContainer);
-	main_editor_button_hb->set_mouse_filter(Control::MOUSE_FILTER_STOP);
-	editor_main_screen->set_button_container(main_editor_button_hb);
-	title_bar->add_child(main_editor_button_hb);
-	title_bar->set_center_control(main_editor_button_hb);
-
 	// Options are added and handled by DebuggerEditorPlugin.
 	debug_menu = memnew(PopupMenu);
 	_add_to_main_menu(TTRC("Debug"), debug_menu);
@@ -7975,11 +7946,40 @@ EditorNode::EditorNode() {
 	}
 	help_menu->add_icon_shortcut(_get_editor_theme_native_menu_icon(SNAME("Heart"), global_menu, dark_mode), ED_SHORTCUT_AND_COMMAND("editor/support_development", TTRC("Support Godot Development")), HELP_SUPPORT_GODOT_DEVELOPMENT);
 
-	// Spacer to center 2D / 3D / Script buttons.
-	right_spacer = memnew(Control);
-	right_spacer->set_mouse_filter(Control::MOUSE_FILTER_PASS);
-	right_spacer->set_h_size_flags(Control::SIZE_EXPAND_FILL);
-	title_bar->add_child(right_spacer);
+	// Separator main_menu.
+	title_bar->add_child(memnew(VSeparator));
+
+	scene_tabs = memnew(EditorSceneTabs);
+	title_bar->add_child(scene_tabs);
+	scene_tabs->set_h_size_flags(Control::SIZE_EXPAND_FILL);
+	scene_tabs->set_v_size_flags(Control::SIZE_EXPAND_FILL);
+	scene_tabs->set_mouse_filter(Control::MOUSE_FILTER_PASS);
+	scene_tabs->connect("tab_changed", callable_mp(this, &EditorNode::_set_current_scene));
+	scene_tabs->connect("tab_closed", callable_mp(this, &EditorNode::_scene_tab_closed));
+
+	distraction_free = memnew(Button);
+	distraction_free->set_theme_type_variation("FlatMenuButton");
+	ED_SHORTCUT_AND_COMMAND("editor/distraction_free_mode", TTRC("Distraction Free Mode"), KeyModifierMask::CTRL | KeyModifierMask::SHIFT | Key::F11);
+	ED_SHORTCUT_OVERRIDE("editor/distraction_free_mode", "macos", KeyModifierMask::META | KeyModifierMask::SHIFT | Key::D);
+	ED_SHORTCUT_AND_COMMAND("editor/toggle_last_opened_bottom_panel", TTRC("Toggle Last Opened Bottom Panel"), KeyModifierMask::CMD_OR_CTRL | Key::J);
+	distraction_free->set_shortcut(ED_GET_SHORTCUT("editor/distraction_free_mode"));
+	distraction_free->set_tooltip_text(TTRC("Toggle distraction-free mode."));
+	distraction_free->set_accessibility_name(TTRC("Distraction-free Mode"));
+	distraction_free->set_toggle_mode(true);
+	scene_tabs->add_extra_button(distraction_free);
+	distraction_free->connect(SceneStringName(pressed), callable_mp(this, &EditorNode::_toggle_distraction_free_mode));
+
+	// Separator scene_tabs.
+	title_bar->add_child(memnew(VSeparator));
+
+	HBoxContainer *main_editor_button_hb = memnew(HBoxContainer);
+	main_editor_button_hb->set_mouse_filter(Control::MOUSE_FILTER_STOP);
+	editor_main_screen->set_button_container(main_editor_button_hb);
+	title_bar->add_child(main_editor_button_hb);
+	title_bar->set_center_control(main_editor_button_hb);
+
+	// Separator for main_editor_button_hb.
+	title_bar->add_child(memnew(VSeparator));
 
 	project_run_bar = memnew(EditorRunBar);
 	project_run_bar->set_mouse_filter(Control::MOUSE_FILTER_STOP);
@@ -7999,6 +7999,7 @@ EditorNode::EditorNode() {
 	renderer->set_focus_mode(Control::FOCUS_NONE);
 	renderer->set_tooltip_text(TTR("Choose a rendering method.\n\nNotes:\n- On mobile platforms, the Mobile rendering method is used if Forward+ is selected here.\n- On the web platform, the Compatibility rendering method is always used."));
 	renderer->set_accessibility_name(TTRC("Rendering Method"));
+	renderer->hide();
 
 	right_menu_hb->add_child(renderer);
 
@@ -8513,16 +8514,6 @@ EditorNode::EditorNode() {
 	add_child(screenshot_timer);
 	screenshot_timer->set_owner(get_owner());
 
-	// Adjust spacers to center 2D / 3D / Script buttons.
-	if (main_menu_button != nullptr) {
-		int max_w = MAX(project_run_bar->get_minimum_size().x + right_menu_hb->get_minimum_size().x, main_menu_button->get_minimum_size().x);
-		left_spacer->set_custom_minimum_size(Size2(MAX(0, max_w - main_menu_button->get_minimum_size().x), 0));
-		right_spacer->set_custom_minimum_size(Size2(MAX(0, max_w - project_run_bar->get_minimum_size().x - right_menu_hb->get_minimum_size().x), 0));
-	} else {
-		int max_w = MAX(project_run_bar->get_minimum_size().x + right_menu_hb->get_minimum_size().x, main_menu_bar->get_minimum_size().x);
-		left_spacer->set_custom_minimum_size(Size2(MAX(0, max_w - main_menu_bar->get_minimum_size().x), 0));
-		right_spacer->set_custom_minimum_size(Size2(MAX(0, max_w - project_run_bar->get_minimum_size().x - right_menu_hb->get_minimum_size().x), 0));
-	}
 	// Extend menu bar to window title.
 	if (can_expand) {
 		DisplayServer::get_singleton()->process_events();
diff --git a/editor/export/editor_export_platform.cpp b/editor/export/editor_export_platform.cpp
index d9defd8a9326..311618ddaea7 100644
--- a/editor/export/editor_export_platform.cpp
+++ b/editor/export/editor_export_platform.cpp
@@ -1952,7 +1952,7 @@ Error EditorExportPlatform::save_pack(const Ref<EditorExportPreset> &p_preset, b
 
 	int64_t pck_start_pos = f->get_position();
 
-	f->store_32(PACK_HEADER_MAGIC);
+	f->store_32(PACK_HEADER_ALTER);
 	f->store_32(PACK_FORMAT_VERSION);
 	f->store_32(GODOT_VERSION_MAJOR);
 	f->store_32(GODOT_VERSION_MINOR);
@@ -2121,7 +2121,7 @@ Error EditorExportPlatform::save_pack(const Ref<EditorExportPreset> &p_preset, b
 
 		uint64_t pck_size = f->get_position() - pck_start_pos;
 		f->store_64(pck_size);
-		f->store_32(PACK_HEADER_MAGIC);
+		f->store_32(PACK_HEADER_ALTER);
 
 		if (r_embedded_size) {
 			*r_embedded_size = f->get_position() - embed_pos;
diff --git a/editor/gui/editor_scene_tabs.cpp b/editor/gui/editor_scene_tabs.cpp
index 504e96e09062..288ae4a93cc1 100644
--- a/editor/gui/editor_scene_tabs.cpp
+++ b/editor/gui/editor_scene_tabs.cpp
@@ -51,7 +51,6 @@
 void EditorSceneTabs::_notification(int p_what) {
 	switch (p_what) {
 		case NOTIFICATION_THEME_CHANGED: {
-			tabbar_panel->add_theme_style_override(SceneStringName(panel), get_theme_stylebox(SNAME("tabbar_background"), SNAME("TabContainer")));
 			scene_tabs->add_theme_constant_override("icon_max_width", get_theme_constant(SNAME("class_icon_size"), EditorStringName(Editor)));
 
 			scene_tab_add->set_button_icon(get_editor_theme_icon(SNAME("Add")));
@@ -405,10 +404,8 @@ EditorSceneTabs::EditorSceneTabs() {
 	set_process_shortcut_input(true);
 	set_process_unhandled_key_input(true);
 
-	tabbar_panel = memnew(PanelContainer);
-	add_child(tabbar_panel);
 	tabbar_container = memnew(HBoxContainer);
-	tabbar_panel->add_child(tabbar_container);
+	add_child(tabbar_container);
 
 	scene_tabs = memnew(TabBar);
 	scene_tabs->set_select_with_rmb(true);
@@ -440,6 +437,7 @@ EditorSceneTabs::EditorSceneTabs() {
 	scene_tab_add->set_accessibility_name(TTRC("Add Scene"));
 	scene_tabs->add_child(scene_tab_add);
 	scene_tab_add->connect(SceneStringName(pressed), callable_mp(EditorNode::get_singleton(), &EditorNode::trigger_menu_option).bind(EditorNode::SCENE_NEW_SCENE, false));
+	scene_tab_add->hide();
 
 	scene_tab_add_ph = memnew(Control);
 	scene_tab_add_ph->set_mouse_filter(Control::MOUSE_FILTER_IGNORE);
diff --git a/editor/gui/editor_scene_tabs.h b/editor/gui/editor_scene_tabs.h
index 3b23aea7e8a2..d1ee62242270 100644
--- a/editor/gui/editor_scene_tabs.h
+++ b/editor/gui/editor_scene_tabs.h
@@ -55,7 +55,6 @@ class EditorSceneTabs : public MarginContainer {
 	};
 
 private:
-	PanelContainer *tabbar_panel = nullptr;
 	HBoxContainer *tabbar_container = nullptr;
 
 	TabBar *scene_tabs = nullptr;
diff --git a/editor/plugins/script_editor_plugin.cpp b/editor/plugins/script_editor_plugin.cpp
index f78e3b2ad12a..55f9800ce9bd 100644
--- a/editor/plugins/script_editor_plugin.cpp
+++ b/editor/plugins/script_editor_plugin.cpp
@@ -42,6 +42,7 @@
 #include "editor/debugger/editor_debugger_node.h"
 #include "editor/debugger/script_editor_debugger.h"
 #include "editor/editor_command_palette.h"
+#include "editor/editor_dock_manager.h"
 #include "editor/editor_help_search.h"
 #include "editor/editor_interface.h"
 #include "editor/editor_main_screen.h"
@@ -1263,13 +1264,25 @@ TypedArray<Script> ScriptEditor::_get_open_scripts() const {
 }
 
 bool ScriptEditor::toggle_files_panel() {
-	list_split->set_visible(!list_split->is_visible());
-	EditorSettings::get_singleton()->set_project_metadata("files_panel", "show_files_panel", list_split->is_visible());
-	return list_split->is_visible();
+	if (list_split_dock->is_inside_tree()) {
+		list_split_dock->remove_child(list_split);
+		script_split->add_child(list_split);
+		script_split->move_child(list_split, 0);
+		list_split->set_h_size_flags(SIZE_FILL);
+		EditorDockManager::get_singleton()->remove_dock(list_split_dock);
+	} else {
+		script_split->remove_child(list_split);
+		list_split_dock->add_child(list_split);
+		list_split->set_h_size_flags(SIZE_EXPAND_FILL);
+		EditorDockManager::get_singleton()->add_dock(list_split_dock, "Script", EditorDockManager::DOCK_SLOT_LEFT_BR, nullptr, "Script");
+		TabContainer *tb = dynamic_cast<TabContainer *>(list_split_dock->get_parent());
+		tb->set_current_tab(list_split_dock->get_index() - 1);
+	}
+	return list_split_dock->is_inside_tree();
 }
 
 bool ScriptEditor::is_files_panel_toggled() {
-	return list_split->is_visible();
+	return list_split_dock->is_inside_tree();
 }
 
 void ScriptEditor::_menu_option(int p_option) {
@@ -1800,6 +1813,7 @@ void ScriptEditor::_notification(int p_what) {
 		} break;
 
 		case NOTIFICATION_EXIT_TREE: {
+			list_split_dock->queue_free();
 			EditorRunBar::get_singleton()->disconnect("stop_pressed", callable_mp(this, &ScriptEditor::_editor_stop));
 		} break;
 
@@ -4182,8 +4196,15 @@ ScriptEditor::ScriptEditor(WindowWrapper *p_wrapper) {
 	overview_vbox->set_custom_minimum_size(Size2(0, 90));
 	overview_vbox->set_v_size_flags(SIZE_EXPAND_FILL);
 
+	list_split_dock = memnew(PanelContainer);
+	list_split_dock->set_v_size_flags(SIZE_EXPAND_FILL);
+	list_split_dock->set_h_size_flags(SIZE_EXPAND_FILL);
+	list_split_dock->set_name(TTR("Script"));
+
 	list_split->add_child(overview_vbox);
-	list_split->set_visible(EditorSettings::get_singleton()->get_project_metadata("files_panel", "show_files_panel", true));
+	if (EditorSettings::get_singleton()->get_project_metadata("files_panel", "show_files_panel", true)) {
+		toggle_files_panel();
+	}
 	buttons_hbox = memnew(HBoxContainer);
 	overview_vbox->add_child(buttons_hbox);
 
diff --git a/editor/plugins/script_editor_plugin.h b/editor/plugins/script_editor_plugin.h
index 6a09ee4cb9f8..7baf23a96b7d 100644
--- a/editor/plugins/script_editor_plugin.h
+++ b/editor/plugins/script_editor_plugin.h
@@ -332,6 +332,7 @@ class ScriptEditor : public PanelContainer {
 	ItemList *help_overview = nullptr;
 	bool help_overview_enabled;
 	VSplitContainer *list_split = nullptr;
+	PanelContainer *list_split_dock = nullptr;
 	TabContainer *tab_container = nullptr;
 	EditorFileDialog *file_dialog = nullptr;
 	AcceptDialog *error_dialog = nullptr;