diff --git a/druid/base/scroll.lua b/druid/base/scroll.lua
index 81d5e46..3850e12 100755
--- a/druid/base/scroll.lua
+++ b/druid/base/scroll.lua
@@ -143,7 +143,7 @@ function Scroll.init(self, view_node, content_node)
 	self.view_border = helper.get_border(self.view_node)
 	self.content_node = self:get_node(content_node)
 
-	self.view_size = vmath.mul_per_elem(gui.get_size(self.view_node), gui.get_scale(self.view_node))
+	self.view_size = helper.get_scaled_size(self.view_node)
 
 	self.position = gui.get_position(self.content_node)
 	self.target_position = vmath.vector3(self.position)
@@ -693,7 +693,7 @@ end
 
 function Scroll._update_size(self)
 	local content_border = helper.get_border(self.content_node)
-	local content_size = vmath.mul_per_elem(gui.get_size(self.content_node), gui.get_scale(self.content_node))
+	local content_size = helper.get_scaled_size(self.content_node)
 
 	self.available_pos = get_border_vector(self.view_border - content_border, self._offset)
 	self.available_size = get_size_vector(self.available_pos)
diff --git a/druid/extended/dynamic_grid.lua b/druid/extended/dynamic_grid.lua
index 0593715..5e8dbc6 100644
--- a/druid/extended/dynamic_grid.lua
+++ b/druid/extended/dynamic_grid.lua
@@ -118,7 +118,7 @@ function DynamicGrid.get_pos(self, index, node, origin_index)
 		assert(not self.first_index, "Dynamic Grid can't have gaps between nodes. Error on grid:add")
 
 		-- If not origin node, so it should be first element in the grid
-		local size = self:_get_node_size(node)
+		local size = helper.get_scaled_size(node)
 		local pivot = const.PIVOTS[gui.get_pivot(node)]
 		return vmath.vector3(
 			size.x * pivot.x - size.x * self.pivot.x,
@@ -308,7 +308,7 @@ function DynamicGrid._add_node(self, node, index, origin_index)
 	self.nodes[index] = {
 		node = node,
 		pos = self:get_pos(index, node, origin_index),
-		size = self:_get_node_size(node),
+		size = helper.get_scaled_size(node),
 		pivot = const.PIVOTS[gui.get_pivot(node)]
 	}
 
@@ -394,7 +394,7 @@ end
 function DynamicGrid._get_next_node_pos(self, origin_node_index, new_node, place_side)
 	local node = self.nodes[origin_node_index]
 
-	local new_node_size = self:_get_node_size(new_node)
+	local new_node_size = helper.get_scaled_size(new_node)
 	local new_pivot = const.PIVOTS[gui.get_pivot(new_node)]
 
 	local dist_x = (node.size.x/2 + new_node_size.x/2) * place_side.x
@@ -410,11 +410,6 @@ function DynamicGrid._get_next_node_pos(self, origin_node_index, new_node, place
 end
 
 
-function DynamicGrid._get_node_size(self, node)
-	return vmath.mul_per_elem(gui.get_size(node), gui.get_scale(node))
-end
-
-
 --- Return side vector to correct node shifting
 function DynamicGrid._get_side_vector(self, side, is_forward)
 	if side == const.SIDE.X then
diff --git a/druid/helper.lua b/druid/helper.lua
index 9f2c621..2b3ceb4 100644
--- a/druid/helper.lua
+++ b/druid/helper.lua
@@ -1,6 +1,6 @@
 -- Copyright (c) 2021 Maksim Tuprikov <insality@gmail.com>. This code is licensed under MIT license
 
---- Druid helper module for gui layouts
+--- Helper module with various usefull GUI functions.
 -- @module Helper
 -- @alias druid.helper
 
@@ -9,7 +9,6 @@ local const = require("druid.const")
 local M = {}
 
 
---- Text node or icon node can be nil
 local function get_text_width(text_node)
 	if text_node then
 		local text_metrics = M.get_text_metrics_from_node(text_node)
@@ -31,6 +30,7 @@ local function get_icon_width(icon_node)
 end
 
 
+--- Text node or icon node can be nil
 local function get_width(node)
 	return gui.get_text(node) and get_text_width(node) or get_icon_width(node)
 end
@@ -43,6 +43,7 @@ end
 -- @tparam[opt] text text_node Gui text node
 -- @tparam[opt] box icon_node Gui box node
 -- @tparam number margin Offset between nodes
+-- @local
 function M.centrate_text_with_icon(text_node, icon_node, margin)
 	M.centrate_nodes(margin, text_node, icon_node)
 end
@@ -55,6 +56,7 @@ end
 -- @tparam[opt] box icon_node Gui box node
 -- @tparam[opt] text text_node Gui text node
 -- @tparam[opt=0] number margin Offset between nodes
+-- @local
 function M.centrate_icon_with_text(icon_node, text_node, margin)
 	M.centrate_nodes(margin, icon_node, text_node)
 end
@@ -98,6 +100,10 @@ function M.centrate_nodes(margin, ...)
 end
 
 
+--- Get current screen stretch multiplier for each side
+-- @function helper.get_screen_aspect_koef
+-- @treturn number stretch_x
+-- @treturn number stretch_y
 function M.get_screen_aspect_koef()
 	local window_x, window_y = window.get_size()
 	local stretch_x = window_x / gui.get_width()
@@ -107,6 +113,10 @@ function M.get_screen_aspect_koef()
 end
 
 
+--- Get current GUI scale for each side
+-- @function helper.get_gui_scale
+-- @treturn number scale_x
+-- @treturn number scale_y
 function M.get_gui_scale()
 	local window_x, window_y = window.get_size()
 	return math.min(window_x / gui.get_width(),
@@ -114,6 +124,12 @@ function M.get_gui_scale()
 end
 
 
+--- Move value from current to target value with step amount
+-- @function helper.step
+-- @tparam number current Current value
+-- @tparam number target Target value
+-- @tparam number step Step amount
+-- @treturn number New value
 function M.step(current, target, step)
 	if current < target then
 		return math.min(current + step, target)
@@ -123,6 +139,12 @@ function M.step(current, target, step)
 end
 
 
+--- Clamp value between min and max
+-- @function helper.clamp
+-- @tparam number a Value
+-- @tparam number min Min value
+-- @tparam number max Max value
+-- @treturn number Clamped value
 function M.clamp(a, min, max)
 	if min > max then
 		min, max = max, min
@@ -138,11 +160,22 @@ function M.clamp(a, min, max)
 end
 
 
+--- Calculate distance between two points
+-- @function helper.distance
+-- @tparam number x1 First point x
+-- @tparam number y1 First point y
+-- @tparam number x2 Second point x
+-- @tparam number y2 Second point y
+-- @treturn number Distance
 function M.distance(x1, y1, x2, y2)
 	return math.sqrt((x2 - x1) ^ 2 + (y2 - y1) ^ 2)
 end
 
 
+--- Return sign of value (-1, 0, 1)
+-- @function helper.sign
+-- @tparam number val Value
+-- @treturn number Sign
 function M.sign(val)
 	if val == 0 then
 		return 0
@@ -152,27 +185,47 @@ function M.sign(val)
 end
 
 
-function M.round(num, numDecimalPlaces)
-	local mult = 10^(numDecimalPlaces or 0)
+--- Round number to specified decimal places
+-- @function helper.round
+-- @tparam number num Number
+-- @tparam[opt=0] number num_decimal_places Decimal places
+-- @treturn number Rounded number
+function M.round(num, num_decimal_places)
+	local mult = 10^(num_decimal_places or 0)
 	return math.floor(num * mult + 0.5) / mult
 end
 
 
+--- Lerp between two values
+-- @function helper.lerp
+-- @tparam number a First value
+-- @tparam number b Second value
+-- @tparam number t Lerp amount
+-- @treturn number Lerped value
 function M.lerp(a, b, t)
 	return a + (b - a) * t
 end
 
 
+--- Check if value is in array and return index of it
+-- @function helper.contains
+-- @tparam table t Array
+-- @param value Value
+-- @treturn number|nil Index of value or nil
 function M.contains(t, value)
 	for i = 1, #t do
 		if t[i] == value then
 			return i
 		end
 	end
-	return false
+	return nil
 end
 
 
+--- Make a copy table with all nested tables
+-- @function helper.deepcopy
+-- @tparam table orig_table Original table
+-- @treturn table Copy of original table
 function M.deepcopy(orig_table)
 	local orig_type = type(orig_table)
 	local copy
@@ -188,35 +241,23 @@ function M.deepcopy(orig_table)
 end
 
 
---- Get text metric from gui node. Replacement of previous gui.get_text_metrics_from_node function
--- @tparam Node text_node
--- @treturn table {width, height, max_ascent, max_descent}
-function M.get_text_metrics_from_node(text_node)
-	local font_name = gui.get_font(text_node)
-	local font = gui.get_font_resource(font_name)
-	return resource.get_text_metrics(font, gui.get_text(text_node), {
-		width = gui.get_size(text_node).x,
-		leading = gui.get_leading(text_node),
-		tracking = gui.get_tracking(text_node),
-		line_break = gui.get_line_break(text_node),
-	})
+--- Get node size adjusted by scale
+-- @function helper.get_scaled_size
+-- @tparam node node GUI node
+-- @treturn vector3 Scaled size
+function M.get_scaled_size(node)
+	return vmath.mul_per_elem(gui.get_size(node), gui.get_scale(node))
 end
 
 
---- Check if node is enabled in gui hierarchy.
+--- Check if node is enabled in GUI hierarchy.
+--
 -- Return false, if node or any his parent is disabled
 -- @function helper.is_enabled
--- @tparam node node Gui node
+-- @tparam node node GUI node
 -- @treturn bool Is enabled in hierarchy
 function M.is_enabled(node)
-	local is_enabled = gui.is_enabled(node)
-	local parent = gui.get_parent(node)
-	while parent and is_enabled do
-		is_enabled = is_enabled and gui.is_enabled(parent)
-		parent = gui.get_parent(parent)
-	end
-
-	return is_enabled
+	return gui.is_enabled(node, true)
 end
 
 
@@ -237,10 +278,10 @@ function M.get_scene_scale(node, include_passed_node_scale)
 end
 
 
---- Return closest non inverted clipping parent node for node
+--- Return closest non inverted clipping parent node for given node
 -- @function helper.get_closest_stencil_node
--- @tparam node node Gui node
--- @treturn node|nil The clipping node
+-- @tparam node node GUI node
+-- @treturn node|nil The closest stencil node or nil
 function M.get_closest_stencil_node(node)
 	if not node then
 		return nil
@@ -262,17 +303,20 @@ function M.get_closest_stencil_node(node)
 end
 
 
---- Get node offset for given gui pivot
+--- Get node offset for given GUI pivot.
+--
+-- Offset shown in [-0.5 .. 0.5] range, where -0.5 is left or bottom, 0.5 is right or top.
 -- @function helper.get_pivot_offset
 -- @tparam gui.pivot pivot The node pivot
--- @treturn vector3 Vector offset with [-1..1] values
+-- @treturn vector3 Vector offset with [-0.5..0.5] values
 function M.get_pivot_offset(pivot)
 	return const.PIVOTS[pivot]
 end
 
 
---- Check if device is mobile (Android or iOS)
+--- Check if device is native mobile (Android or iOS)
 -- @function helper.is_mobile
+-- @treturn bool Is mobile
 function M.is_mobile()
 	return const.CURRENT_SYSTEM_NAME == const.OS.IOS or
 			 const.CURRENT_SYSTEM_NAME == const.OS.ANDROID
@@ -281,12 +325,14 @@ end
 
 --- Check if device is HTML5
 -- @function helper.is_web
+-- @treturn bool Is web
 function M.is_web()
 	return const.CURRENT_SYSTEM_NAME == const.OS.BROWSER
 end
 
 
---- Transform table to oneline string
+--- Simple table to one-line string converter
+-- @function helper.table_to_string
 -- @tparam table t
 -- @treturn string
 function M.table_to_string(t)
@@ -309,13 +355,13 @@ end
 
 --- Distance from node position to his borders
 -- @function helper.get_border
--- @tparam node node The gui node to check
--- @tparam vector3 offset The offset to add to result
--- @return vector4 Vector with distance to node border: (left, top, right, down)
+-- @tparam node node GUI node
+-- @tparam[opt] vector3 offset Offset from node position. Pass current node position to get non relative border values
+-- @treturn vector4 Vector4 with border values (left, top, right, down)
 function M.get_border(node, offset)
 	local pivot = gui.get_pivot(node)
 	local pivot_offset = M.get_pivot_offset(pivot)
-	local size = vmath.mul_per_elem(gui.get_size(node), gui.get_scale(node))
+	local size = M.get_scaled_size(node)
 	local border = vmath.vector4(
 		-size.x*(0.5 + pivot_offset.x),
 		size.y*(0.5 - pivot_offset.y),
@@ -334,9 +380,10 @@ function M.get_border(node, offset)
 end
 
 
---- Get text metric from gui node. Replacement of previous gui.get_text_metrics_from_node function
+--- Get text metric from GUI node.
+-- @function helper.get_text_metrics_from_node
 -- @tparam Node text_node
--- @treturn table {width, height, max_ascent, max_descent}
+-- @treturn GUITextMetrics Fields: width, height, max_ascent, max_descent
 function M.get_text_metrics_from_node(text_node)
 	local font_resource = gui.get_font_resource(gui.get_font(text_node))
 	local options = {
@@ -354,6 +401,15 @@ function M.get_text_metrics_from_node(text_node)
 end
 
 
+--- Add value to array with shift policy
+--
+-- Shift policy can be: left, right, no_shift
+-- @function helper.insert_with_shift
+-- @tparam table array Array
+-- @param item Item to insert
+-- @tparam[opt] number index Index to insert. If nil, item will be inserted at the end of array
+-- @tparam[opt] const.SHIFT shift_policy Shift policy
+-- @treturn item Inserted item
 function M.insert_with_shift(array, item, index, shift_policy)
 	shift_policy = shift_policy or const.SHIFT.RIGHT
 
@@ -377,6 +433,14 @@ function M.insert_with_shift(array, item, index, shift_policy)
 end
 
 
+--- Remove value from array with shift policy
+--
+-- Shift policy can be: left, right, no_shift
+-- @function helper.remove_with_shift
+-- @tparam table array Array
+-- @tparam[opt] number index Index to remove. If nil, item will be removed from the end of array
+-- @tparam[opt] const.SHIFT shift_policy Shift policy
+-- @treturn item Removed item
 function M.remove_with_shift(array, index, shift_policy)
 	shift_policy = shift_policy or const.SHIFT.RIGHT
 
@@ -404,6 +468,7 @@ end
 --- Show deprecated message. Once time per message
 -- @function helper.deprecated
 -- @tparam string message The deprecated message
+-- @local
 local _deprecated_messages = {}
 function M.deprecated(message)
 	if _deprecated_messages[message] then
@@ -415,7 +480,8 @@ function M.deprecated(message)
 end
 
 
--- Show message to require extended component
+--- Show message to require extended component
+-- @local
 function M.extended_component(component_name)
 	print(string.format("[Druid]: The component %s is extended component. You have to register it via druid.register to use it", component_name))
 	print("[Druid]: Use next code:")
diff --git a/druid/system/druid_instance.lua b/druid/system/druid_instance.lua
index 9942f2f..ece0568 100755
--- a/druid/system/druid_instance.lua
+++ b/druid/system/druid_instance.lua
@@ -16,7 +16,7 @@
 --
 -- @{BaseComponent} - The parent class of all Druid components. You can find all default component methods there.
 --
--- Other important information:
+-- # Tech Info #
 --
 -- • To use Druid, you need to create a Druid instance first. This instance is used to spawn components.
 --
@@ -253,7 +253,7 @@ function DruidInstance.initialize(self, context, style)
 end
 
 
---- Create new component
+--- Create new component.
 -- @tparam DruidInstance self
 -- @tparam Component component Component module
 -- @tparam args ... Other component params to pass it to component:init function
@@ -271,8 +271,7 @@ function DruidInstance.new(self, component, ...)
 end
 
 
---- Call on final function on gui_script. It will call on_remove
--- on all druid components
+--- Call this in gui_script final function.
 -- @tparam DruidInstance self
 function DruidInstance.final(self)
 	local components = self.components_all
@@ -289,7 +288,8 @@ function DruidInstance.final(self)
 end
 
 
---- Remove component from druid instance.
+--- Remove component from Druid instance.
+--
 -- Component `on_remove` function will be invoked, if exist.
 -- @tparam DruidInstance self
 -- @tparam Component component Component instance
@@ -333,7 +333,7 @@ function DruidInstance.remove(self, component)
 end
 
 
----  Druid late update function called after initialization and before the regular update step
+--- Druid late update function called after initialization and before the regular update step
 -- This function is used to check the GUI state and perform actions after all components and nodes have been created.
 -- An example use case is performing an auto stencil check in the GUI hierarchy for input components.
 -- @tparam DruidInstance self
@@ -353,6 +353,7 @@ end
 
 
 --- Call this in gui_script update function.
+--
 -- Used for: scroll, progress, timer components
 -- @tparam DruidInstance self
 -- @tparam number dt Delta time
@@ -370,6 +371,7 @@ end
 
 
 --- Call this in gui_script on_input function.
+--
 -- Used for almost all components
 -- @tparam DruidInstance self
 -- @tparam hash action_id Action_id from on_input
@@ -390,6 +392,7 @@ end
 
 
 --- Call this in gui_script on_message function.
+--
 -- Used for special actions. See SPECIFIC_UI_MESSAGES table
 -- @tparam DruidInstance self
 -- @tparam hash message_id Message_id from on_message
diff --git a/update_docs.sh b/update_docs.sh
index 34ca68d..e469afb 100755
--- a/update_docs.sh
+++ b/update_docs.sh
@@ -13,4 +13,5 @@ echo "Update EmmyLua annotations"
 original_path=$(pwd)
 bash $emmylua_generator_path/export.sh $original_path
 mv $emmylua_generator_path/annotations.lua $original_path/druid/annotations.lua
+cat ./utils/annotations_manual.lua >> $original_path/druid/annotations.lua
 cp $original_path/utils/ldoc_fixed.css $original_path/docs/ldoc_fixed.css
diff --git a/utils/annotations_manual.lua b/utils/annotations_manual.lua
index 8259dd5..70b269e 100644
--- a/utils/annotations_manual.lua
+++ b/utils/annotations_manual.lua
@@ -1,3 +1,5 @@
+-- Manual Annotations --
+
 ---@class druid.rich_text.metrics
 ---@field width number
 ---@field height number
@@ -49,3 +51,9 @@
 ---@field default_animation string
 ---@field node_prefab Node
 ---@field text_prefab Node
+
+---@class GUITextMetrics
+---@field width number
+---@field height number
+---@field max_ascent number
+---@field max_descent number