Graph Settings Tab

Inherit: The Unity Editor automatically selects the preview mode to use.
Preview 2D: Renders the output of the Sub Graph as a flat two-dimensional preview.
Preview 3D: Renders the output of the Sub Graph on a three-dimensional object such as a sphere.

Description

The Graph Settings tab on the Graph Inspector makes it possible to change settings that affect the Shader Graph as a whole.

Menu Item	Description
Precision	Select Single or Half from the Precision dropdown menu as the graph's default Precision Mode for the entire graph.
Preview Mode	Select your preferred preview mode for a node that has a preview from the following options: Inherit: The Unity Editor automatically selects the preview mode to use. Preview 2D: Renders the output of the Sub Graph as a flat two-dimensional preview. Preview 3D: Renders the output of the Sub Graph on a three-dimensional object such as a sphere. This property is available only when you selected a Sub Graph.
Active Targets	A list that contains selected targets. You can add or remove Active Targets by selecting the Add (+) and Remove (−) buttons, respectively. Shader Graph supports three targets: Built-in: Shaders for Unity’s Built-In Render Pipeline. Custom Render Texture: Shaders for updating Custom Render Textures. Universal: Shaders for the Universal Render Pipeline. The available properties displayed depend on the targets you have added to the list. Refer to the Shader Material Inspector window properties for the respective Materials you select for the Built-in and Universal targets.