1. Open your Microsoft PowerPoint and select the presentation you want to edit.
2. Select the slide where you want to add the illustration.
3. Click the "Insert" button located on the top toolbar.
4. Click on "Pictures" located in the Illustrations section.
5. Select "Stock Images".
6. Select "Illustrations".
7. Browse or search for the illustration you want to insert.
8. Click the "Insert" button.
9. Resize and move the image to your preferred location.