Back to that picture, it looks like that because there's nothing in layer 8 (the back-most layer). And the "Area End of Level" event is in "Gameplay -> Area". There are two kinds: the regular "Area End of Level" which makes Jazz zoom off the screen, and "Area Warp EOL", with a warp animation.

Another event that may come in handy is "Jazz Start", found in "Gameplay -> Start position". Normally Jazz starts a level in the upper left corner, but with that event you can make him start anywhere you want.

- JelZe GoldRabbit =:3