diff --git a/project.godot b/project.godot
index 046002eef..853f723ff 100644
--- a/project.godot
+++ b/project.godot
@@ -875,6 +875,10 @@ right_curvetool_tool={
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":true,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":74,"physical_keycode":0,"key_label":0,"unicode":106,"echo":false,"script":null)
 ]
 }
+alpha_lock={
+"deadzone": 0.5,
+"events": []
+}
 
 [input_devices]
 
diff --git a/src/Autoload/Global.gd b/src/Autoload/Global.gd
index a611e3d2f..82e09f220 100644
--- a/src/Autoload/Global.gd
+++ b/src/Autoload/Global.gd
@@ -786,6 +786,7 @@ func _initialize_keychain() -> void:
 		"horizontal_mirror": Keychain.InputAction.new("", "Buttons"),
 		"vertical_mirror": Keychain.InputAction.new("", "Buttons"),
 		"pixel_perfect": Keychain.InputAction.new("", "Buttons"),
+		"alpha_lock": Keychain.InputAction.new("", "Buttons"),
 		"new_layer": Keychain.InputAction.new("", "Buttons"),
 		"remove_layer": Keychain.InputAction.new("", "Buttons"),
 		"move_layer_up": Keychain.InputAction.new("", "Buttons"),
diff --git a/src/UI/GlobalToolOptions/GlobalToolOptions.tscn b/src/UI/GlobalToolOptions/GlobalToolOptions.tscn
index cc03f0188..d2ed234ab 100644
--- a/src/UI/GlobalToolOptions/GlobalToolOptions.tscn
+++ b/src/UI/GlobalToolOptions/GlobalToolOptions.tscn
@@ -23,7 +23,7 @@ action = &"vertical_mirror"
 events = [SubResource("InputEventAction_24etr")]
 
 [sub_resource type="InputEventAction" id="InputEventAction_ebgk6"]
-action = &"pixel_perfect"
+action = &"alpha_lock"
 
 [sub_resource type="Shortcut" id="Shortcut_vcyug"]
 events = [SubResource("InputEventAction_ebgk6")]