In the tutorial for Holy Grail, there are three sliders shown.

I only have two: offset and rotate.

Also these have no effect.

Can someone throw some light on this?

Cheers

The 3. slider has been removed, that's okay. They have effect if you use a sequence shot with the holy grail approach (manual change of Shutter Speed/ISO) and created the Keyframes with the keyframes wizard first!