Materials define the appearance of elements in the building model. Revit Architecture provides many materials that you can use, or you can create your own materials.
To search for materials
to apply to model elements, or to change material properties, use
the Materials dialog. You can access the Materials dialog by clicking
Manage tab
Settings Panel 
Materials.
Use the left pane of the Materials dialog to find a material. Use the right pane to change properties of the selected material. To show or hide the right pane, click Properties at the bottom of the left pane.
