# Coordinate System
Coordinate systems in OVERDARE Studio consist of a 3D coordinate system for representing the position, size, and rotation of objects in 3D space, and a 2D coordinate system (UDim2) for defining the scale and offset of GUI elements in 2D space.
## 3D Coordinate System
In OVERDARE Studio, the 3D coordinate system uses the right-handed coordinate system, and the default unit for position and size is **centimeters (cm)**.
The **Position** or **Orientation** of an object can be set individually using **Vector3**, but using the **CFrame** data type allows you to set both at once.
```lua
-- Position
Part.Position = Vector3.new(0, 50, -300)
-- Orientation
Part.Orientation = Vector3.new(0, 0, 30)
-- CFrame
local targetPosition = Vector3.new(0, 30, 0)
local upVector = Vector3.new(0, 1, 0)
Part.CFrame = CFrame.lookAt(Part.Position, targetPosition, upVector)
```
CFrame, short for **Coordinate Frame**, is a data type that contains both the Position and Orientation information of an object.
Learn More
{% content-ref url="../../../development/api-reference/datatype/cframe" %}
[cframe](https://docs.overdare.com/development/api-reference/datatype/cframe)
{% endcontent-ref %}
## 2D Coordinate System
In OVERDARE Studio, the 2D space uses the UDim2 format. In UDim2, Scale represents a percentage (%) of the parent object’s size, and Offset represents the position or size in pixels.
```lua
local TextLabel = script.Parent
TextLabel.AnchorPoint = Vector2.new(0.5, 0.5)
TextLabel.Position = UDim2.new(0.5, 0, 0.5, 0)
TextLabel.Size = UDim2.new(0.5, 0, 0, 200)
local TextPos = TextLabel.Position
print(TextPos.X.Scale, TextPos.X.Offset, TextPos.Y.Scale, TextPos.Y.Offset)
```
