Make a base chair
Create a sketch.
Click Extruded Boss/Base on the Features toolbar, or click Insert, Boss/Base, Extrude
Set the PropertyManager
Up to Surface.
Select a face or plane to extend to in the graphics area for Face/Plane .
Double-click a surface to change the End Condition to Up to Surface, with the selected surface as the termination surface.
Merge result (Boss/Base extrudes only).
Merges resultant body into an existing body if possible. If not selected, the feature creates a distinct solid body
Selected Contours .
Allows you to use a partial sketch to create extrude features. Select sketch contours and model edges in the graphics area.
