The main Presentation Window is split into two parts or "panes":
Slide Sorter pane. The Slide Sorter displays all the slides in the current presentation, in order of appearance. Click on individual slides to select them.
Slide pane. The Slide pane shows the current slide in an "edit" mode. You can select individual elements of the slide- text, pictures or shapes - by clicking on them. At the bottom of this pane is an area for making notes.
At the bottom of the Screen there is a Drawing toolbar. You can insert pictures, shapes and text using this toolbar.