I completly understand your confusion @dbartlett , I had this one as well. As @jamespeltzer mentions above, you can create a toggle button through the use of "button", however, this is a "dumb" button that only changes it's style/appereance, there is actually no true/false, 1/0, on/off value assosiated with it.
In order to create a toggle button you need to create parameter button (use the one with checkbox, not the dropdown list with "true" in it - the bottom right one). Create a new parameter with the button and you can now read this value. It will be 0 for it's "off" state, and 1 for it's "on" state.
#DashBoard