If you’re talking about the flyout menu at the left, look at
Wayfinder and in it’s archive, you see cssplay folder. In that folder you find instructions how to implement a flyout menu. I have updated the cssplay demos since though and there will be a new flyout version with the next Wayfinder release. You can get it
here temporarily if you want..
"He can have a lollipop any time he wants to. That's what it means to be a programmer."