Sliders

The slider is connected to a variable. Set that variable to 0. That will reset the slider.

Thanks for stopping in to assist here, Walt! And Chad, Walt's suggestion should do the trick for you, but if you find you still need help, feel free to share your file and we'll see what more we can do to assist. :)

I have a slider that is being used to show the pH scale with 0-14 and starting point is 7 (center). When the user gets to a certain value the slider will trigger a layer to show/play defining that pH level. I am trying to get this to happen once only as the slider must go left or right from 7 and then back again to explore the other side of the scale. Problem is when I come back from the extremes of the scale I have to trigger the layers again which were just seen in order to get to the other unexplored triggers/layers.... I want them to show the layer only once but cant find a good design to do this as of yet...Any help appreciated. 

For the pH layer 8, create a variable named Eight. Add these two triggers to layer 8:

"Hide layer 8 when timeline starts on this layer if variable Eight = True", and "Adjust variable Eight set = True when timeline starts on this layer."

Be sure they are in this order, and repeat (with a unique variable) for each layer.