Kind of like with the regular letter keys there's lower case and upper case letters. Well basically the top row of keys has two different modes. Another problem people have is sometimes they want to use the special functions at the top of the keyboard, like pausing music, changing screen brightness and such, and when they try to use those keys they just don't do anything. In fact they do completely different things. But when they press those keys on the keyboard they don't work for that app. One is that they want to use keyboard shortcuts in an app that show F1, F2, F3, etc., as the shortcut. So there are two different problems involving the top row of keys that Mac users face. There you can read more about it, join us, and get exclusive content. MacMost is brought to you thanks to a great group of more than 500 supporters. It's how to switch between the two modes of the top row of your Mac keyboard. Today I want to talk about a problem that trips up a lot of new Mac users. Check out Understanding the Function And Special Features Keys On the Mac Keyboard at YouTube for closed captioning and more options.