A few other things to know about managing multiple iTunes libraries:
- If you have multiple iTunes libraries on your computer and don't hold down the Option or Shift button when you launch iTunes, it will open the last library used
- By default, all libraries are signed into whatever iTunes account was last used. To make sure that each person uses only their iTunes account with their library, always remember to sign out of your iTunes account when you're done using iTunes
- Despite having multiple iTunes libraries with this technique, it doesn't allow for different parental control settings for each library. Whatever parental control settings you use will apply to all libraries on the computer.