engine/docs/en/UI/quickStart/transform.md

order, title, type, label

order	title	type	label
1	UITransform	UI	UI

The UITransform component is specifically designed to represent the size and position of UI elements. It inherits from the Transform component.

Editor Usage

When a node with a UI component is added, the UITransform component will automatically be added (replacing the previous Transform component). In the editor, you can select the node and use the RectTool (shortcut key T) to quickly adjust properties, or you can set precise properties in the Inspector Panel.

When the main canvas's render mode is Screen, the editor will prohibit modifications to its transform to avoid screen adaptation issues. Therefore, in scripts, developers should avoid modifying the transform properties of the main canvas in screen space.

Properties

Property Name	Description
size	The size of the UI element. x represents width, and y represents height. The default is 100 for both.
pivot	The anchor point of the UI element. It is a normalized 2D vector with the origin at the bottom-left corner, with the default value being the center (0.5, 0.5).

Script Usage

// Add UICanvas
const canvasEntity = root.createChild("canvas");
const canvas = canvasEntity.addComponent(UICanvas);
const imageEntity = canvasEntity.create("Image");
(<UITransform>imageEntity.transform).size.set(200, 200);
(<UITransform>imageEntity.transform).pivot.set(0, 0);