Soak option inserts a 2-hr soak period before the wash water drains (usable on all cycles), with a few agitation strokes every minute (based on older models, depending how it's programmed on this series, presumably the same). Time Saver & Soak should be selectable together, cuts the cycle time in half so 1-hr soak. Pressing Advance (the double-arrow button right of the cycle progress lights) during the soak aborts it to continue rest of the cycle.
(Intuitive Eco models have a few minutes more agitation after the soak / before drain, Eco Smart models don't.)
Softener Rinse changes Regular and Heavy to a deep/agitated rinse. Normal rinse is a series of saturation sprays and extraction spins. Perm Press, Wool Washables, and Delicate run an agitated rinse so Softener Rinse has no effect on them.