Hi Shipdude98,
Environment jumps are explained in the Mission Editor tutorial. You can download the PDF file here:
http://www.shipsim.com/ShipSimForum/index.php/topic,2886.0.html (http://www.shipsim.com/ShipSimForum/index.php/topic,2886.0.html)
After you have worked through the tutorial examples, you should have an understanding of the environment switch. If you have any questions, you can PM me or use the email address in the tutorial.
God Luck,
Marty