The Shader columns in the Shader manager let you prioritize any Shaders used in your scene.
Use the Shader 1 menu to select a base shader to be used with your model.
Select No Shader to detach the selected shader from the selected object. The shaders listed include all the shaders created using the shader options in the Asset browser.
Use the Shader 2 through Shader 5 columns to append additional shaders. Each shader is applied over the previous one, letting you combine shaders.
To view hidden Shader Manager columns:
Shader Manager