This video demonstrates how to add a placemark to Google Earth and how to set its appearance.

Google Earth Tutorials: 

These video tutorials are screen captures that demonstrate a particular skill used in Google Earth or a demonstration of a Real World Math lesson.  Some videos may offered as Kmz files to play in Google Earth’s placemark windows, so that instructional references to the application can be seen simultaneously.  These are all YouTube videos.  You’ll find the download link below each video.