diff --git a/BuildController.gd b/BuildController.gd
index b98c40d..d44eec7 100644
--- a/BuildController.gd
+++ b/BuildController.gd
@@ -19,6 +19,7 @@ extends Node2D
 @onready var world_map: Control = get_node("../UI/WorldMap")
 @onready var build_button: IconButton = get_node("../UI/BuildButton")
 @onready var action_button: IconButton = get_node("../UI/BuildActionButton")
+@onready var building_action_button: IconButton = get_node("../UI/BuildingActionButton")
 
 @onready var build_menu: Control = get_node("../UI/BuildMenu")
 @onready var build_mothership_button: IconButton = get_node("../UI/BuildMenu/MothershipButton")
@@ -209,6 +210,7 @@ var transfer_building_id: int = 0
 var current_building: Node2D = null
 var pending_building: Node2D = null
 var pending_time: float = 0.0
+var context_actions_expanded: bool = false
 
 
 func _ready() -> void:
@@ -230,7 +232,8 @@ func _ready() -> void:
 	info_close_button.pressed.connect(_close_info)
 	info_build_button.pressed.connect(_confirm_build)
 
-	action_button.pressed.connect(_on_action_pressed)
+	action_button.pressed.connect(_on_context_action_pressed)
+	building_action_button.pressed.connect(_on_action_pressed)
 
 	craft_interceptor_button.pressed.connect(_on_craft_interceptor)
 	craft_transporter_button.pressed.connect(_on_craft_transporter)
@@ -266,6 +269,7 @@ func _ready() -> void:
 	lab_menu.visible = false
 	transfer_menu.visible = false
 	action_button.visible = false
+	building_action_button.visible = false
 	transfer_button.visible = false
 	hangar_button.visible = false
 	hangar_menu.visible = false
@@ -281,6 +285,12 @@ func is_showing_building_prompt() -> bool:
 
 
 func _unhandled_input(event: InputEvent) -> void:
+	if context_actions_expanded and (event is InputEventScreenTouch and event.pressed \
+			or event is InputEventMouseButton and event.pressed and event.button_index == MOUSE_BUTTON_LEFT):
+		# Buttons consume their own touch; reaching this handler means the tap
+		# landed somewhere else, which dismisses an expanded action list.
+		_collapse_context_actions()
+
 	# The formation editor and the skill tree are driven from here rather than
 	# via _gui_input, for the same reason as the joystick: a Control that
 	# consumes touches through the GUI system swallows them before they get
@@ -337,8 +347,10 @@ func _process(delta: float) -> void:
 		current_building = null
 		pending_building = null
 		action_button.visible = false
+		building_action_button.visible = false
 		transfer_button.visible = false
 		hangar_button.visible = false
+		context_actions_expanded = false
 		return
 
 	# Debounced exactly like the enter-atmosphere prompt, so the action
@@ -355,7 +367,7 @@ func _process(delta: float) -> void:
 		return
 
 	current_building = pending_building
-	action_button.visible = current_building != null
+	context_actions_expanded = false
 	# The hangar is where finished vessels are delivered (#23), so it belongs
 	# at the mothership and nowhere else.
 	hangar_button.visible = current_building != null \
@@ -363,26 +375,68 @@ func _process(delta: float) -> void:
 	# Every building can hold ore, so the transfer button rides alongside the
 	# action button rather than being one of the things the action button
 	# turns into - the two are independent choices at the same structure.
-	transfer_button.visible = current_building != null
+	transfer_button.visible = false
+	building_action_button.visible = false
+	action_button.visible = current_building != null
 	if current_building != null:
-		action_button.icon = _action_icon_for(current_building.building_type)
+		var actions: Array = _context_action_buttons()
+		building_action_button.icon = _action_icon_for(current_building.building_type)
+		building_action_button.queue_redraw()
+		action_button.icon = building_action_button.icon if actions.size() == 1 else IconButton.Icon.ACTION_MENU
 		action_button.queue_redraw()
 	_layout_context_buttons()
 
 
 func _layout_context_buttons() -> void:
-	# Every contextual action uses a distinct, fixed berth above Build. This
-	# replaces the old hand-picked offsets where Hangar overlapped Action at a
-	# mothership (#25).
-	var buttons: Array = [action_button, transfer_button]
-	if hangar_button.visible:
-		buttons.append(hangar_button)
+	# Build is permanently under the resource counter. The contextual berth
+	# directly below it is compact until it has more than one real choice.
+	action_button.offset_top = 324
+	action_button.offset_bottom = 472
+	var buttons: Array = _context_action_buttons()
+	if not context_actions_expanded:
+		for button in buttons:
+			button.visible = false
+		return
 	for i in range(buttons.size()):
 		var button: Control = buttons[i]
-		button.offset_top = -720 + i * 164
+		button.visible = true
+		button.offset_top = 488 + i * 164
 		button.offset_bottom = button.offset_top + 148
 
 
+func _context_action_buttons() -> Array:
+	if current_building == null:
+		return []
+	var actions: Array = [transfer_button]
+	if current_building.building_type in [GameState.BUILDING_MOTHERSHIP, GameState.BUILDING_SHIP_CRAFTER,
+			GameState.BUILDING_SHIP_LAB, GameState.BUILDING_COMMAND_CENTER]:
+		actions.push_front(building_action_button)
+	if current_building.building_type == GameState.BUILDING_MOTHERSHIP:
+		actions.append(hangar_button)
+	return actions
+
+
+func _on_context_action_pressed() -> void:
+	if current_building == null:
+		return
+	var actions: Array = _context_action_buttons()
+	if actions.size() == 1:
+		if actions[0] == transfer_button:
+			_on_transfer_pressed()
+		else:
+			_on_action_pressed()
+		return
+	context_actions_expanded = not context_actions_expanded
+	_layout_context_buttons()
+
+
+func _collapse_context_actions() -> void:
+	if not context_actions_expanded:
+		return
+	context_actions_expanded = false
+	_layout_context_buttons()
+
+
 func _action_icon_for(type: String) -> int:
 	match type:
 		GameState.BUILDING_SHIP_CRAFTER:
diff --git a/IconButton.gd b/IconButton.gd
index e2f09fc..767faf8 100644
--- a/IconButton.gd
+++ b/IconButton.gd
@@ -25,6 +25,7 @@ enum Icon {
 	UPGRADE_DAMAGE, UPGRADE_RATE, UPGRADE_RANGE, UPGRADE_THRUSTERS,
 	UPGRADE_SHIELD_HITS, UPGRADE_SHIELD_RECHARGE, UPGRADE_CARGO,
 	UPGRADE_ENGINES, UPGRADE_UNLOCK_SHIELD,
+	ACTION_MENU,
 }
 
 # Size the glyphs were originally drawn against. Every glyph dimension is
@@ -176,6 +177,8 @@ func _draw() -> void:
 			_draw_upgrade_engines(center, pulse, s)
 		Icon.UPGRADE_UNLOCK_SHIELD:
 			_draw_upgrade_unlock_shield(center, pulse, s)
+		Icon.ACTION_MENU:
+			_draw_action_menu(center, pulse, s)
 
 
 func _draw_close(center: Vector2, pulse: float, s: float) -> void:
@@ -300,6 +303,17 @@ func _draw_upgrade_unlock_shield(center: Vector2, pulse: float, s: float) -> voi
 	NeonDraw.draw_glowing_line(self, center + Vector2(0, -4) * s, center + Vector2(0, 4) * s, _active_color(), pulse, 0.45 * s, core_color)
 
 
+func _draw_action_menu(center: Vector2, pulse: float, s: float) -> void:
+	# A small, intentionally neutral stack of choices. It marks a button that
+	# opens context actions rather than carrying out one particular action.
+	for y in [-8.0, 0.0, 8.0]:
+		NeonDraw.draw_glowing_line(self, center + Vector2(-10, y) * s, center + Vector2(10, y) * s, _active_color(), pulse, 0.42 * s, core_color)
+		NeonDraw.draw_glowing_polygon(self, PackedVector2Array([
+			center + Vector2(-15, y - 2) * s, center + Vector2(-11, y) * s,
+			center + Vector2(-15, y + 2) * s,
+		]), _active_color(), pulse, core_color)
+
+
 func _draw_build(center: Vector2, pulse: float, s: float) -> void:
 	# A plus inside a frame - "add a structure".
 	var r: float = 11.0 * s
diff --git a/Main.tscn b/Main.tscn
index 450d77f..dbd94fd 100644
--- a/Main.tscn
+++ b/Main.tscn
@@ -121,46 +121,47 @@ script = ExtResource("10")
 icon = 3
 
 [node name="BuildButton" type="Control" parent="UI"]
-anchor_top = 1.0
-anchor_bottom = 1.0
 offset_left = 24
 offset_right = 172
-offset_top = -890
-offset_bottom = -742
+offset_top = 160
+offset_bottom = 308
 script = ExtResource("10")
 icon = 5
 
 [node name="BuildActionButton" type="Control" parent="UI"]
 visible = false
-anchor_top = 1.0
-anchor_bottom = 1.0
 offset_left = 24
 offset_right = 172
-offset_top = -720
-offset_bottom = -572
+offset_top = 324
+offset_bottom = 472
+script = ExtResource("10")
+icon = 2
+
+[node name="BuildingActionButton" type="Control" parent="UI"]
+visible = false
+offset_left = 24
+offset_right = 172
+offset_top = 488
+offset_bottom = 636
 script = ExtResource("10")
 icon = 2
 
 [node name="HangarButton" type="Control" parent="UI"]
 visible = false
-anchor_top = 1.0
-anchor_bottom = 1.0
 offset_left = 24
 offset_right = 172
-offset_top = -776
-offset_bottom = -628
+offset_top = 488
+offset_bottom = 636
 script = ExtResource("10")
 icon = 2
 glow_color = Color(0.45, 0.9, 0.55, 1)
 
 [node name="TransferButton" type="Control" parent="UI"]
 visible = false
-anchor_top = 1.0
-anchor_bottom = 1.0
 offset_left = 24
 offset_right = 172
-offset_top = -600
-offset_bottom = -452
+offset_top = 488
+offset_bottom = 636
 script = ExtResource("10")
 icon = 14
 glow_color = Color(1, 0.78, 0.25, 1)
diff --git a/tests/test_hangar_management.gd b/tests/test_hangar_management.gd
index 8ad6cd3..a842eb0 100644
--- a/tests/test_hangar_management.gd
+++ b/tests/test_hangar_management.gd
@@ -63,18 +63,25 @@ func _process(delta: float) -> bool:
 			_fail("hangar allowed the last deployed ship to be stored")
 			return true
 
-		# #25: all three contextual controls have non-overlapping vertical
-		# rectangles when the mothership exposes Action, Transfer and Hangar.
-		controller.action_button.visible = true
-		controller.transfer_button.visible = true
-		controller.hangar_button.visible = true
+		# Context actions are compact until expanded. A mothership has three
+		# choices: research, transfer cargo and hangar, which must receive
+		# their own non-overlapping berth only after expansion.
+		var mothership: Node2D = load("res://Building.tscn").instantiate()
+		mothership.set("building_type", GameState.BUILDING_MOTHERSHIP)
+		controller.current_building = mothership
+		controller.context_actions_expanded = true
 		controller._layout_context_buttons()
-		var buttons: Array = [controller.action_button, controller.transfer_button, controller.hangar_button]
+		var buttons: Array = [controller.building_action_button, controller.transfer_button, controller.hangar_button]
 		for i in range(buttons.size() - 1):
 			if buttons[i].offset_bottom > buttons[i + 1].offset_top:
 				_fail("context buttons %d and %d overlap" % [i, i + 1])
 				return true
-		print("hangar crews and stores typed vessels; contextual buttons have separate berths")
+		controller._collapse_context_actions()
+		if controller.building_action_button.visible or controller.transfer_button.visible or controller.hangar_button.visible:
+			_fail("collapsing the context button left an action visible")
+			return true
+		mothership.free()
+		print("hangar crews and stores typed vessels; contextual actions expand and collapse")
 		print("TEST_HANGAR_MANAGEMENT: PASS")
 		quit(0)
 		return true