How do you get grease pencil working in 2.8 build?

When I tried to use grease pencil in 2.8 build and nothing happens when I draw, does any one have a tutorial on how to get grease pencil working? Or is it not included in 2.8 alpha? No matter what I do it doesn’t draw anything, I get the brush cursor but no stroke. Help me please? I would really like to try out the new grease pencil.

Try switching render engines.

http://graphicall.org/1229