Adding Opacity Slider to Map Contents tool

Discussion created by ggarza on Apr 9, 2012
Latest reply on Apr 19, 2012 by kdalton-esristaff
Is there a way to add an opacity slider to listed layers in the Map Contents control of the viewer?
Or would I need to create a new control?  I would like to avoid that, if possible, as I like the other functionality of the Map Contents control.