Another top tip for locations: You can set up locations based on network requirements, say for example you can have an Ethernet only network location by removing all other network interfaces by judicious use of the minus button. Another good use of the locations is to check to see if networking issues can be troubleshot down to an interface. Say a client can't connect wirelessly: Make a test location, do the Apply and see if this resolves. If it does all you have to do, in the original location, is remove and re-add the errant interface (in this case the Wi-Fi, with - followed by an +) and don't forget the Apply.
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