diff --git a/core/config/project_settings.cpp b/core/config/project_settings.cpp
index 38db7f91902f8..5c4bcc687a9fb 100644
--- a/core/config/project_settings.cpp
+++ b/core/config/project_settings.cpp
@@ -1198,6 +1198,9 @@ ProjectSettings::ProjectSettings() {
 	GLOBAL_DEF("display/window/size/window_height_override", 0);
 	custom_prop_info["display/window/size/window_height_override"] = PropertyInfo(Variant::INT, "display/window/size/window_height_override", PROPERTY_HINT_RANGE, "0,4320,1,or_greater"); // 8K resolution
 
+	GLOBAL_DEF("display/window/energy_saving/keep_screen_on", true);
+	GLOBAL_DEF("display/window/energy_saving/keep_screen_on.editor", false);
+
 	GLOBAL_DEF_BASIC("audio/buses/default_bus_layout", "res://default_bus_layout.tres");
 	custom_prop_info["audio/buses/default_bus_layout"] = PropertyInfo(Variant::STRING, "audio/buses/default_bus_layout", PROPERTY_HINT_FILE, "*.tres");
 	GLOBAL_DEF_RST("audio/general/2d_panning_strength", 1.0f);
diff --git a/doc/classes/ProjectSettings.xml b/doc/classes/ProjectSettings.xml
index 40477d27d40b6..9df8d2df80c57 100644
--- a/doc/classes/ProjectSettings.xml
+++ b/doc/classes/ProjectSettings.xml
@@ -549,6 +549,9 @@
 		<member name="display/window/energy_saving/keep_screen_on" type="bool" setter="" getter="" default="true">
 			If [code]true[/code], keeps the screen on (even in case of inactivity), so the screensaver does not take over. Works on desktop and mobile platforms.
 		</member>
+		<member name="display/window/energy_saving/keep_screen_on.editor" type="bool" setter="" getter="" default="false">
+			Editor-only override for [member display/window/energy_saving/keep_screen_on]. Does not affect exported projects in debug or release mode.
+		</member>
 		<member name="display/window/handheld/orientation" type="int" setter="" getter="" default="0">
 			The default screen orientation to use on mobile devices. See [enum DisplayServer.ScreenOrientation] for possible values.
 			[b]Note:[/b] When set to a portrait orientation, this project setting does not flip the project resolution's width and height automatically. Instead, you have to set [member display/window/size/viewport_width] and [member display/window/size/viewport_height] accordingly.
diff --git a/main/main.cpp b/main/main.cpp
index 4c4377a174c21..965fcc66c66d4 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -1481,7 +1481,6 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 		OS::get_singleton()->_allow_layered = false;
 	}
 
-	OS::get_singleton()->_keep_screen_on = GLOBAL_DEF("display/window/energy_saving/keep_screen_on", true);
 	if (rtm == -1) {
 		rtm = GLOBAL_DEF("rendering/driver/threads/thread_model", OS::RENDER_THREAD_SAFE);
 	}
diff --git a/platform/ios/display_server_ios.mm b/platform/ios/display_server_ios.mm
index 080ee5f3ab565..6ce7e676a2269 100644
--- a/platform/ios/display_server_ios.mm
+++ b/platform/ios/display_server_ios.mm
@@ -128,7 +128,7 @@
 	}
 #endif
 
-	bool keep_screen_on = bool(GLOBAL_DEF("display/window/energy_saving/keep_screen_on", true));
+	bool keep_screen_on = bool(GLOBAL_GET("display/window/energy_saving/keep_screen_on"));
 	screen_set_keep_on(keep_screen_on);
 
 	Input::get_singleton()->set_event_dispatch_function(_dispatch_input_events);
diff --git a/platform/linuxbsd/display_server_x11.cpp b/platform/linuxbsd/display_server_x11.cpp
index 3409e43ba5b2f..8efbd2e3c52fc 100644
--- a/platform/linuxbsd/display_server_x11.cpp
+++ b/platform/linuxbsd/display_server_x11.cpp
@@ -4991,7 +4991,7 @@ DisplayServerX11::DisplayServerX11(const String &p_rendering_driver, WindowMode
 
 #ifdef DBUS_ENABLED
 	screensaver = memnew(FreeDesktopScreenSaver);
-	screen_set_keep_on(GLOBAL_DEF("display/window/energy_saving/keep_screen_on", true));
+	screen_set_keep_on(GLOBAL_GET("display/window/energy_saving/keep_screen_on"));
 #endif
 
 	r_error = OK;
diff --git a/platform/macos/display_server_macos.mm b/platform/macos/display_server_macos.mm
index e2280072466b8..a49485154b1e9 100644
--- a/platform/macos/display_server_macos.mm
+++ b/platform/macos/display_server_macos.mm
@@ -3286,7 +3286,7 @@ Point2i window_position(
 	}
 #endif
 
-	screen_set_keep_on(GLOBAL_DEF("display/window/energy_saving/keep_screen_on", true));
+	screen_set_keep_on(GLOBAL_GET("display/window/energy_saving/keep_screen_on"));
 }
 
 DisplayServerMacOS::~DisplayServerMacOS() {
diff --git a/platform/uwp/os_uwp.cpp b/platform/uwp/os_uwp.cpp
index 7bc4c6047ca7e..40f93bb18bbc8 100644
--- a/platform/uwp/os_uwp.cpp
+++ b/platform/uwp/os_uwp.cpp
@@ -275,7 +275,7 @@ Error OS_UWP::initialize(const VideoMode &p_desired, int p_video_driver, int p_a
 		display_request->RequestActive();
 	}
 
-	set_keep_screen_on(GLOBAL_DEF("display/window/energy_saving/keep_screen_on", true));
+	set_keep_screen_on(GLOBAL_GET("display/window/energy_saving/keep_screen_on"));
 
 	return OK;
 }
diff --git a/platform/windows/display_server_windows.cpp b/platform/windows/display_server_windows.cpp
index a975d09a9db3a..8c8dbef8a4acd 100644
--- a/platform/windows/display_server_windows.cpp
+++ b/platform/windows/display_server_windows.cpp
@@ -3653,7 +3653,7 @@ DisplayServerWindows::DisplayServerWindows(const String &p_rendering_driver, Win
 	tts = memnew(TTS_Windows);
 
 	// Enforce default keep screen on value.
-	screen_set_keep_on(GLOBAL_DEF("display/window/energy_saving/keep_screen_on", true));
+	screen_set_keep_on(GLOBAL_GET("display/window/energy_saving/keep_screen_on"));
 
 	// Note: Wacom WinTab driver API for pen input, for devices incompatible with Windows Ink.
 	HMODULE wintab_lib = LoadLibraryW(L"wintab32.dll");