Instructions provided describe how to clip data to the data frame in ArcMap. After performing this clip, data does not display outside the data frame, however it is still processed when printing or exporting.
Change the view to the Layout view. Click on View from the main toolbar and select Layout View.
Right-click on the data frame in the Table of Contents and select Properties.
Select the Data Frame tab and click on the Enable check box in Clip to Shape then click the Specify Shape button.
Click the Custom Extent radio button. The custom extent is automatically populated with the data frame's current extent. Click OK twice. If the projection dialog box pops up, click OK.
Note: If there is more than one data frame in the map, repeat the change for each data frame.