The line tool ( ) lets you create shapes and graphics by drawing lines, arbitrary polygons, or curved paths. Unlike all of the other tools, you don't drag to create new paths with the line tool. Instead, you click for each vertex you'd like to add to your path.

To draw a straight line, simply click once where you want the line to start, and double-click where you want the line to end. To make a multi-vertex path, click for each vertex and then double-click, press enter, or make a vertex inside the origin box to end the path.

As you draw the line, "locked-in" sections are drawn in green and the next segment is drawn in red. Hold down Ctrl at any time to snap the next segment to 15° increments.

On the line tool's toolbar, you can choose between three modes:

• normal line mode

• perpendicular mode

• curve mode

Perpendicular mode is just like line mode except that each segment is restricted to either horizontal or vertical. Curve mode will create a Bézier curve path by attempting to draw a smooth curve between the previous two vertices and the new vertex.