In SL2: I want to have a seekbar on most slides so the user can monitor his/her progress. And for almost all those slides I want to make the seekbar read-only, so the user cannot advance without reaching the end of the timeline. But on one slide I want the user to be able to drag the seekbar thereby allowing him/her to advance to the next slide if he/she chooses to (on this one slide only). Is this possible? Thanks in advance.