•
Switch into Path Surface Creation mode by
pressing the Path Mode Tool 
or by selecting "Path Mode" from the
Surfaces sub-menu (ribbon toolbar’s Create Tab).
The cursor will change to the path surface cursor.
• Determine what order you will select the points and objects (marked points, object points, lines, edge marks, edges, curve marks, or curves). You will need to make sure the path you define does not cross over itself and will close properly.
• Select the first object of the path from a photo, 3D view or table.
The selected object will highlight. Note: since by definition a close curve is closed path it can be the only object in a path. Selecting a closed curve will automatically create a path surface using the curve as the defining path.
• Select the second object of the path from a photo, 3D view or table.
The second object will highlight and a path will be drawn on any open photographs with marks for all items in the path If the selected objects are 3D and the minimum requirements for a path are met the surface will also display in 3D.
If the line, edge or curve you select is not added to the path in the direction you need you can use the "Reverse Last Object" command, located on the Surface sub-menu (ribbon toolbar’s Create Tab), to reverse it.
• Continue with selecting objects to complete the path.
If you make a mistake when selecting the path if you click on the last object in the path it will be remove from the path.
• When you are finished you can either click back on the first object in the path, or you can select "Finish Surface" from the right-click or surface menu (ribbon toolbar’s Create Tab).
The path outline displayed on any open photos will erase and the surface be added to the project.
Note: the direction a path faces is determined by the direction (clockwise or counter-clockwise) its path is selected. If the surface you create does not face the direction you would like you can use the "Flip Surface(s)" command, located on the surface sub-menu. This command will flip the currently selected or, if no surfaces are selected, the last created Surface. Surfaces also have a "double sided" property that will mean a surface 'faces' in both directions. See Surface Properties.