Answer:
First, know which ArcGIS Explorer you are using, DESKTOP(AGXD) or ONLINE (AGXO). The rules are different for each interface.
Second, here are the rules...
- Save your personal photo in an online service, such as Picasa. It needs to be accessible from the web.
- When you have saved your photo online, you can edit the pop-up window. This way it doesn't matter which interface you use (AGXO or AGXD).
- AGXD: Just click that little pencil icon in the bottom right corner. Drop in the URL of your photo. Save it and you're all set. You can also add a local path to a photo but remember you'll need to open the map document on that same computer for it to show up. (see http://blogs.esri.com/Info/blogs/arcgisexplorerblog/archive/2009/09/18/adding-photos-to-your-map-using-notes.aspx)
- AGXO: Click the create features button, place the feature (point, line or polygon) on the map, click the feature, in the bottom right corner select edit and edit pop-up. Drop in the URL of your photo on the image URL line. Click OK.
- You can add photos in ArcGIS Explorer Desktop (AGXD) to be used in a presentation, a URL in a pop-up and to customize the symbols(markers).
- From Esri AGX Blog on How to customize a symbol: http://blogs.esri.com/Info/blogs/arcgisexplorerblog/archive/2010/06/03/Creating-custom-point-symbols.aspx
- My version of the instructions: You can customize a picture to become a marker...instead of one of the stock icons.
- right-click the place name in contents
- select symbols
- select manage symbols
- browse to your picture
- ok
- then on the appearance tab, select the new picture as your symbol
In the example picture above, I've used AGXD to make my marker unique and added a URL of a personal photo in the pop-up window for that point feature.
It's really easy and offers some great opportunities to share information geographically!