Change the Appearance

Ensure Steel - Test is selected in the Material browser.
In the Asset section of the Material Editor, select the Appearance asset.
To the right, click
In the Asset Browser, select the Appearance named Steel - Galvanized
Click . You can also use double-click to select and exchange an appearance in one step.
Close the Material Editor.
Select the component and in the Material Browser, select the new material Steel - Test. The part has the new material and appearance.
Close the Material Browser.