You can save one slide or your whole presentation as a JPEG from PowerPoint. Open your presentation and go to the specific slide you wish to save as a JPEG. Click on the File tab, Save As and key in name for your image in the File Name box. In the Save As Type box right below change the format to JPEG File Interchange Format, click Save. A box will appear asking which slides you want to export, click on Just This One and it’s done! Go to the file where you saved it and you will see your JPEG image.