Deleting a user account
I want to delete a second user account that is also an admin. I've opened "users and groups" and unlocked it so I can make changes. My name is highlighted, but I can't highlight the account I want to delete. I know I have to use the minus sign to delete the account, but how do I highlight the account I want to get rid of? I'm using OS X El Capitan.
iMac 21.5", OS X 10.11