Android actionbar how to add supporting library v7 appcompat for Eclipse

I followed every steps in Android - ActionBar to add action bar. I extend the activity from ActionBarActivity: public class MainActivity extends ActionBarActivity I need to add appcompat v7 support library as in here: In "Adding libraries with resources", eclipse section. The last steps: "Add the library to your application project: - In the Project Explorer, right-click your project and select Properties. - In the Library pane, click Add. - Select the library project and click OK. For example, the appcompat project should be listed as android-support-v7-appcompat. - In the properties window, click OK. " Step 2 is where I can't find the Library pane. How can I add the library to my project?