Select
Polygonal Lasso tool in the Tools palette.
pointer where you want to end the line, and click.
pointer over the starting point and click.
To temporarily switch to
Lasso tool, hold down Option ⌥
Tool Options
You can switch to
Lasso tool and use the following
Polygonal Lasso modes:
New - to draw new selection.
Add To - add to border of existing selection.
Subtract From - substract from border of existing selection.
The Polygonal Lasso tool also has an option called "Anti-alias" to smooth the edges of a selection.
Learn more about how to enhance a selection.
Move
Rectangular Marquee
Elliptical Marquee
Lasso
Polygonal Lasso
Magic Wand
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