Once your text is in place, you can scroll on the left where you will see a little green "add" arrow. If you click on that, several choices are listed, one of which is "photo". Click on photo and a photo capsule will appear. Click on "edit", and another screen will come up with several choices.
If you have photos on a flash drive, cd or desktop, you can hit "choose photo", then click on the photo of your choice. In a minute, the photo will appear, and you can then write in the source (you in this case) and any text you'd like to add. You can also vary the size of the photo or put a border on it.
Click "save" and you are done.