With the 
Path Profile tool enabled, right click on the map to show the settings for the path, or click the 
settings button on the Path Profile window. Check the Display Series of Profiles Perpendicular to Path to create cross sectional views along the path.
Step through the perpendicular profiles (cross sections) along the path using the 
left and right arrows on the Path Profile/Line of Sight window, or using the left and right arrows on your keyboard when the path profile window is selected.
The spacing of the cross sections along the path and the width / length of the cross section can be set by right clicking on the map to show the settings for the path. The cross sections (perpendicular profiles) can be spaced to line up with each vertex and endpoint of the line, they can be calculated at a fixed distances along the line, or they can equally subdivide the path.
With the Path Profile tool enabled, right click on the Main Map view and choose Path Profile Settings or using the settings button on the Path Profile window to turn on Perpendicular Profile view.
Choose the Display Series of Profiles Perpendicular to Path option to enable the perpendicular view. This allows stepping through cross sections along the defined path.
The Perpendicular Path Length allows you to specify the total width of the cross section.
The Perpendicular Spacing... button brings up the Path Profile Spacing Setup Dialog
Sample Elevations at Fixed Number of Regularly Spaced Locations - This setting will generate Perpendicular Profiles at evenly spaced location along the length of the line.
Sample Elevation at Fixed Distance Interval - This will generate Perpendicular Profiles at a fixed distance along the length of the line.
Sample Elevations at Profile Vertices/ Endpoints Only - This option will generate Perpendicular profile / cross section at each vertex of the line.
Keep All Original Vertices - This option is available when using Sample Elevations at Fixed Number of Regularly Spaced Locations or Sample Elevations at Fixed Distance Interval. In addition to generating the specified perpendicular profiles, it will include profiles at each vertex and the endpoints of the line feature.