http://www.quiltingboard.com/t-158319-9.htm (original conversation)
Look in your manual, under 'change the machine settings', if it is possible to change it on your machine, it will tell you how to do so. If it is still not clear to you, call 1-(877)276-8437, which is the customer support number. It may take some time to get through, but be patient, they are great at walking you through this kind of thing, I have brain damage, and they never get upset with my limitations.
Good info. of course i just packed my machine for up comming trip. Won't be able to check for at least 2 weeks. Anyone else have a Brother NX 600, can the needle be changed.