You can save all the images in your presentation separately, but you can also opt to save just one.
This is what you do:
1. Click on File and then click on Save As.

2. Select where you want to save the file, then type a name in the File name field.

3. Click on the arrow next to Save as type. In the list, select either JPEG (for lower image quality) or PNG (for higher image quality).

4. Click on Save.

5. You will now be asked whether you want to save all images in your slide show or just the current image (the image you selected when you clicked on Save As).
6. In this example, we will click on Every Slide.

7. Click on OK.

You have now saved your project as separate images.