In AutoTrack - when you look at the clock design you can add them from the section on the left by dragging them into the position in the clock you want - then you add the time you'd like it to be reset to.
In Myriad you can right click on the log and "Insert Log Item"> "Reset Time"> add the time you want the timings to be reset to.
I'm not sure there is a tutorial, but basically if you put a reset time in for 15mins, anything before the marker will show you how well you are doing getting there, i.e. overrun / underrun. This is only an advisory to the presenter.
An "Absolute time" allows you to have items backed to finish at a certain time, or items to start at a specific time if "AutoFade" mode. Most often used for IRN News Switching.
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