Installation Options

Since we want our application to be added on to Facebook, we'll need to fill in some Installation Options. As with the Base options, we can leave most of them blank, just filling in a few essential ones:

As you can see, the Post-Add URL needs to be added (this should be the same as your Canvas Page URL), and you can enter some arbitrary text into the Default FBML box.

Now, I did mention a little while ago that you can prevent your application being used before you're ready, and this is the section where you do that. Just tick the Developer Mode box.

First Page: Setting Up Facebook Application