Can Checkbox sizes and spacing in quizzes be adjusted?

Hi Vishal,

Thanks for sending your file. I took a look and I'm not sure what you mean by unused items? I didn't see anything on your slide that seemed out of place, and without knowing what you intend I'm not sure which parts you don't want to use? 

If you're referring to items on the slide, you should be able to select them on the slide or in the timeline and choose to delete them.

If you are trying to remove player elements, you can review the tutorial here for how to change them within the player or towards the bottom of this article there are steps on changing them at the slide level.