where to measure for ride height

[450r07]

where do i need to measure to check the ride height on the front end of my bike. I know where to measure in the rear but i need to measure the front to see if i am somewhat even.

[Scro]

Right behind the rear a-arm mount.

[Smoker]

GT Thunder shock setup=good (http://www.gtthunder.com/ShockSetup.htm)