The Polygonal Lasso creates straight-line selections. Perfect for creating a selection around a windowpane, or the roofline of a house. Select the Polygonal Lasso tool on the toolbox from the available Lasso options, and click to create a point; then move and click to create straight lines between the two points. Keep clicking and moving your mouse until the desired selection shape appears. Double-clicking the mouse instructs the Polygonal Lasso tool to close the selection shape.