Where in settings do you go to set your default launcher?

I have several launchers installed and I cant for the life of me figure out where in settings I go to switch the one I want to the default launcher...

Go to settings / apps / select your current launcher. Scroll down a little and find a clear defaults button. Next time you hit the home button, it'll ask which launcher you want to use.

Help! I have Apex and Nova installed as well as Touchwiz. I cleared defaults on all three, then told the phone I wanted Apex, and it told me to go clear defaults again. Every time I press the home button from an app, I have to go through an extra step. I have no other launchers. After I told the phone I wanted Apex, it showed it was the default, but the phone always asks which launcher. Argh!