When you create a path that combines straight and curved lines, you create corner points to indicate the transition from a straight line to a curved line (or vice versa).
In this procedure, you'll draw two separate line segments, creating two differently shaped curves: a half-circle curve and an s-curve. The position of the direction lines for the corner points determines which type of curve you create.
1 To start the second path (which begins with a straight line), click point D with the pen tool; then hold down Shift and click point E (don't drag).
Holding down Shift constrains the position so that the segment is perfectly horizontal.
2 Move the pointer over point E and drag to the red dot to set the directional line for the next segment (which will be an upward half-circle curve).
3 Drag from point F to the red dot; then Alt-click (Windows) or Option-click (Mac OS) point F to set a corner point.
4 Hold down Shift, and click point G to create a straight line. Then end the path using one of the methods you learned.
5 Click with the pen tool on point H to start a path for the s-curve; then hold down Shift and click point I.
6 At point I, Alt-drag (Windows) or Option-drag (Mac OS) down from point I to the red dot to make point I a corner point.
7 Drag down from point J to the red dot.
8 Alt-click (Windows) or Option-click (Mac OS) point J to make it a corner point.
9 Shift-click point K, and then end the path using one of the methods you've learned.
10 Choose File > Close, and don't save changes.
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