Hi, someone overwrote this page., so it now looks different. If you put your mouse over the black knob image, you’ll see a scroll bar appear on the right side. Here is a screenshot: https://www.dropbox.com/s/xpbdv3cxzx5nmyc/Screen%20Shot%202016-01-22%20at%209.12.53%20AM.png?dl=0
This happens in chrome, firefox, and safari. I am on a mac, but someone using chrome on a PC first brought this to my attention.
Thanks for your suggestions.