You are ready to digitize. Zoom to the area around polygon 72. Notice that polygon 72 in land_ dig is made of a series of lines(edges), which are connected by(vertices). Click the Straight Segment Tool on the Editor toolbar. Digitize a starting point of polygon 72 by left-clicking the mouse. Use land dig as a guide to digitize the other vertices. When you come back to the starting Point, right-click the mouse and sclect Finish Sketch. The completed polygon 72 appears in cyan with an x inside it. A feature appearing in cyan s an active feature To unselect polygon 72, click the Edit tool and click a point outside the polygon. If you make mistake in digitizing and need to delete a polygon in triall, use the Edit tool to first select and activate the polygon and then press the Delete key.