diff --git a/project.godot b/project.godot
index 63d14c5..dd12d0e 100644
--- a/project.godot
+++ b/project.godot
@@ -80,6 +80,7 @@ config/windows_native_icon="res://build/logo.ico"
 
 window/size/width=360
 window/size/height=760
+window/size/resizable=false
 window/size/always_on_top=true
 window/per_pixel_transparency/allowed=true
 window/per_pixel_transparency/enabled=true
diff --git a/scripts/config_manager.gd b/scripts/config_manager.gd
index c4a4af8..e53f5af 100644
--- a/scripts/config_manager.gd
+++ b/scripts/config_manager.gd
@@ -149,6 +149,19 @@ func get_current_task_name() -> String:
 	return _config.get_value("CACHE", "current_task_name", "")
 
 
+var last_window_position := Vector2() setget set_last_window_position, get_last_window_position
+
+
+func set_last_window_position(value: Vector2) -> void:
+	last_window_position = value
+	_config.set_value("CACHE", "last_window_position", value)
+	save()
+
+
+func get_last_window_position() -> Vector2:
+	return _config.get_value("CACHE", "last_window_position", OS.get_screen_size()/2)
+
+
 ###############################################################################
 #
 # BOOTSTRAP
diff --git a/ui/main.gd b/ui/main.gd
new file mode 100644
index 0000000..369db2f
--- /dev/null
+++ b/ui/main.gd
@@ -0,0 +1,49 @@
+extends VBoxContainer
+
+var config: ConfigManager = preload("res://config_manager.tres")
+
+onready var v_box_container_primary := $"%VBoxContainerPrimary" as VBoxContainer
+onready var toggle_tab_container_button := $"%ToggleTabContainerButton" as Button
+onready var tab_container := $"%TabContainer" as TabContainer
+
+func _ready() -> void:
+	toggle_tab_container_button.toggle_mode = true
+	# warning-ignore:return_value_discarded
+	toggle_tab_container_button.connect("toggled", self, "_on_toggle_tab_container_button_toggled")
+	tab_container.visible = toggle_tab_container_button.pressed
+	OS.window_position = config.last_window_position
+	set_window_size()
+	get_tree().get_root().set_transparent_background(true)
+
+
+func _on_toggle_tab_container_button_toggled(is_toggled: bool) -> void:
+	tab_container.visible = is_toggled
+	set_window_size()
+
+
+func set_window_size() -> void:
+	OS.window_size = v_box_container_primary.rect_size
+	if tab_container.visible:
+		OS.window_size.y += tab_container.rect_size.y
+
+
+var mouse_button_is_pressed := false
+var dragging_start_position = Vector2()
+
+func _gui_input(event: InputEvent) -> void:
+	if event is InputEventMouseButton:
+		if event.get_button_index() == 1:
+			mouse_button_is_pressed = !mouse_button_is_pressed
+			dragging_start_position = get_local_mouse_position()
+
+
+func _process(_delta: float) -> void:
+	if mouse_button_is_pressed:
+		OS.set_window_position(OS.window_position + get_global_mouse_position() - dragging_start_position)
+
+
+func _notification(what: int) -> void:
+	match what:
+		MainLoop.NOTIFICATION_WM_QUIT_REQUEST:
+			config.last_window_position = OS.window_position
+			get_tree().quit()
diff --git a/ui/main.tscn b/ui/main.tscn
index bf177d4..d15a367 100644
--- a/ui/main.tscn
+++ b/ui/main.tscn
@@ -1,22 +1,43 @@
-[gd_scene load_steps=4 format=2]
+[gd_scene load_steps=5 format=2]
 
 [ext_resource path="res://ui/time_counter.tscn" type="PackedScene" id=1]
 [ext_resource path="res://ui/tasks_list.tscn" type="PackedScene" id=2]
 [ext_resource path="res://ui/settings.tscn" type="PackedScene" id=3]
+[ext_resource path="res://ui/main.gd" type="Script" id=4]
 
-[node name="VBoxContainer" type="VBoxContainer"]
+[node name="Main" type="VBoxContainer"]
 anchor_right = 1.0
 anchor_bottom = 1.0
+script = ExtResource( 4 )
 
-[node name="TimeCounter" parent="." instance=ExtResource( 1 )]
+[node name="VBoxContainerPrimary" type="VBoxContainer" parent="."]
+unique_name_in_owner = true
+margin_right = 360.0
+margin_bottom = 72.0
+
+[node name="TimeCounter" parent="VBoxContainerPrimary" instance=ExtResource( 1 )]
 anchor_right = 0.0
 anchor_bottom = 0.0
 margin_right = 360.0
 margin_bottom = 48.0
 
-[node name="TabContainer" type="TabContainer" parent="."]
+[node name="HBoxContainer" type="HBoxContainer" parent="VBoxContainerPrimary"]
 margin_top = 52.0
 margin_right = 360.0
+margin_bottom = 72.0
+alignment = 2
+
+[node name="ToggleTabContainerButton" type="Button" parent="VBoxContainerPrimary/HBoxContainer"]
+unique_name_in_owner = true
+margin_left = 348.0
+margin_right = 360.0
+margin_bottom = 20.0
+toggle_mode = true
+
+[node name="TabContainer" type="TabContainer" parent="."]
+unique_name_in_owner = true
+margin_top = 76.0
+margin_right = 360.0
 margin_bottom = 760.0
 size_flags_vertical = 3
 
@@ -42,4 +63,4 @@ size_flags_vertical = 3
 anchor_right = 0.0
 anchor_bottom = 0.0
 margin_right = 352.0
-margin_bottom = 672.0
+margin_bottom = 648.0