Using the lasso tool
You have a couple options using the lasso tool. Free hand, polygonal,
and magnetic lasso.
Free hand: is self explanitory.
Polygonal: will always have a point or straight line.
Magnetic: will try to detect the edge of the object you are trying to
1.) Open up an image file.
2.) Click on the polygonal lasso tool. (Hold down the left click button and select polygonal.)
This is how you use the lasso tool in photoshop.