The default panel for a curtain wall is typically a glazed panel. As you create the curtain grid and refine the wall design, you might want to use other materials for some of the panels. You can select the existing panels and in the Type Selector, select a panel type with the material you want to use.
Additionally, the panel type controls the thickness and can define a door or window for the panel.
To select all of the panels, select the edge of the curtain wall, right-click, and choose Select Panels on Host. To select a panel, move the cursor over its edge, press <Tab> until it highlights, and then click to select it.
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This is a short excerpt from the Autodesk Revit 2018: Architecture Fundamentals learning guide. To purchase, visit http://www.ASCENTed.com.