The Forbidden lands sheet uses 7 different dice(base, skill, gear, 2 mighty, epic, and legendary) that can be rolled at once. Sheetworkers are triggered by action buttons pressed on the sheet that pre-load the dice pool with the appropriate number of dice and type. Adjustments can be made to the pool if desired and then a roll is made from within the dice pool section to roll the dice. On the Forbidden Lands sheet, the roll template determines which dice images to show based each dice result. The roll template used to show the custom dice images is HUGE for this particular sheet. I believe other Year Zero-based sheets(Alien, MY0, Coriolis,...), FFG Star Wars, not sure what other systems/sheets... use a dice pool system.