If you need to know how to apply clipping mask in Illustrator, the quickest way is to go to the object tab in Illustrator. This gives you with the click of a button an easy way to apply a clipping mask.
With this tutorial, learn exactly how to apply a clipping mask using Illustrator CS4.
easy10seconds is a software training resource that doesn't just present text instructions for learning applications such as Adobe Illustrator CS4, they present interactive video tutorials on very specific topics, which reinforces learning through simulation and practice. Learn all of the pertinent software commands by their actual location in the program, removing any unnecessary effort with quick and to the point training.