Agent photos can be added through the IDX Control Panel. Here are the steps:

1. Login to your Wordpress website
2. Navigate to "Optima Express->IDX Control Panel" from the left-hand menu bar.
3. Click on "Setup"
4. Expand the "Agents & Offices" tab
5. Select "Agents"
6. Find the agent you want to edit and click on their name
7. Under the "Basic Information" section you can either enter the URL of their existing photo, or choose "Upload Photo" to upload a photo from your computer.
8. Click "Save Agent Settings"