code: public void next(final boolean skipSlideStep) {
          synchronized (this) {
              // Try to display the next slide step first
              // If no slide step is remaining, display the next slide
              if (skipSlideStep || this.selectedSlideModel.nextStep() && this.slidePosition < getPresentationService().getPresentation().getSlides().getSlide().size() - 1) {
                  this.slidePosition = Math.min(this.slidePosition + 1, getPresentationService().getPresentation().getSlides().getSlide().size() - 1);
                  displaySlide(getPresentationService().getPresentation().getSlides().getSlide().get(this.slidePosition), false);
              }
          }
      }
docs: Got to next slide.