Powerpoint has a variety of layouts for viewing your work. You are currently on the Outline View layout. Please look at the bottom left-hand corner of the window and locate the 5 icons that are similar to the image below :

From left to right, the layouts are :
1. Slide View - allows you to work with each individual slide
2. Outline View - allows you to work with the general (text) outline of your presentation.
3. Slide Sorter View - allows you to view all the slides at once.
4. Notes Page View - allows you to create personal presentation notes for each slide.
5. Slide Show - allows you to view your work as it would be seen in a presentation.

*If you place your cursor over a tool icon for a few seconds, a tool-tip box will appear giving you the name of the tool.