General Questions

Is there a discard changes button?

Once I make a change to say the DHCP server, I get an Apply changes button at the top.  If I change my mind and no longer wish to apply the changes, how do I revert back to the original configuration?  I hope I don't have to reboot.

The changes aren't made until the Apply button is hit. Go to another page and come back; you should see that things are like they were.