Choose the right view for the task

Normal view

Create and edit your slides.

Select View > Normal.

Or, select Normal from the task bar at the bottom of the screen.

Slide Sorter view

See thumbnails of all your slides and reorder them.

Select View > Slide Sorter.

Or, select Slide Sorter from the task bar at the bottom of the screen.
To reorganize your slides, drag a slide to a new location.

Notes Page view

View your speaker notes.

Select View > Notes Page.

Or, select Notes from the task bar at the bottom of the screen.

Slide Show view

Select Slide Show from the task bar at the bottom of the screen.

If you want to see your current slide, next slide, and speaker notes while you present, select the Slide Show tab, and then select the Use Presenter View checkbox.

Master views

Make universal style changes to every slide, notes page, or handout using the Slide, Handout, or Notes Master views on the ribbon.

Source: Microsoft