CStepFan's dashboard

Edit ": I need to transition slides within a few seconds of each other in the middle of my presentation. It works fine for the first slide in the timeline, where I transition after 3 seconds. However, in the middle of my presentation, I can't get the markers closer than 20 seconds apart, and I don't see where I can enter the end marker times by plugging in the numbers. Is this possible, or am I wasting my time with Slidecast?