This video shows how to add hatching to components in cross section. The two steps discussed in the video are 1.) Add Hatching settings to desired element templates, and 2.) select the components in the 3D model and add the element template.
Click the video below to play it. To view in fullscreen mode, first click the YouTube link at the bottom of the video to launch the video on the YouTube site. Then, click the fullscreen button (rightmost button at bottom of video).