Which tab or category do you need to be on to add a picture or graphic to your presentation?

I have added a new slide, but the layout is wrong. Where do I go to fix it?

I have created a slide with a bulleted list. I would like each item to show up one at a time. Where do I go to make this happen?

I am using the presentation to teach a science lesson. I have typed a few notes under some of the slides. I would like to see all of the notes for each slide. Where do I go to see this information?