To preview a transition on a slide, you should follow the instruction that directly relates to the Transitions tab and a preview function.

• "Click Presenter View in Slide Show to play the transition on the slide." (This is for presenting, not a quick preview.)
• "Click Preview on the Transitions tab to play the transition on the slide." (This is the standard method in most presentation software.)
• "Click From Beginning only to preview every slide regardless of selection." (This plays the entire slideshow, not just a single transition.)
• "Hover the mouse over the gallery to play transitions automatically on slides." (This is a passive preview, not an explicit click action.)

The most direct and common way to preview a transition applied to a specific slide is to use the "Preview" option found within the "Transitions" tab of the software.

The correct way to preview the transition is:
Click Preview on the Transitions tab to play the transition on the slide.