How to select a specific surface of a mesh with multiple surfaces using shaders

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:bust_in_silhouette: Asked By Xian

Hello, I imported a obj file i made on blender and it has multiple surfaces and normally when i want to add shaders to it i would need to place shaders on each and every one of the surfaces manually.

I just wanna know if there is a way to reduce the number shader materials i have for a obj with multiple surfaces to have only 1 material file that can select a specific surface.