Time Trial / Time Trialling / TT

Now this is a thing I can't get my head around about the arcane mysteries of bike fit. I feel like if I move my saddle forward/backwards, then I end up riding in the same position just on a different part of the saddle. It feels to me like I would need to move the saddle back and the bars closer (or higher?) to actually effect a change of position.

He meant tip the saddle, as in, angle the nose up a smidge, not move the fore/aft position.