1. Click on media on the top bar.
2. On the left column under categories, click the plus next to the category you want to open (as an example, north america). Repeat as needed (as an example united states and then abilene zoo).
3. Click on the blue tab near the upper left that says add media. Now click the tab that says upload image and it will bring a popup window that lets you navigate to wherever the photo is stored on your computer.