This article describes a simple way to create section views of drawing views by creating sketch lines.
One method is to select a drawing view and add sketch lines to that cut into the drawing view.
As of SolidWorks 2013, a construction line and a regular line yield different section views. Construction lines are ignored by the section cut, while solid line segments appear in the section view.
Once the sketch lines are all made, select the sketch lines and select Section View.
If the original sketch line needs to be edited, right click on the Section Line in the feature manager tree, and select Edit Sketch.