# Get 18% more keys for free with this one crazy trick > You probably only have 78 keys on your keyboard. So why do you never use 12 of them? You probably only have 78 keys on your keyboard.[^mac-us] So why do you never use 12 of them? [^mac-us]: US keyboard on a modern Mac laptop. These keys, of course, are the F-keys F1 through F12. By default, macOS uses them for the glyphs printed thereon. But tell me the last time you pressed any of these: - F3 for Mission Control. - F4 for Spotlight. - F5 for whatever that microphone does. - F6 for Sleep.[^sleep] - F7–F9 for Music control. [^sleep]: TIL that there's a built-in Sleep shortcut! I've created my own via a Raycast shortcut for _years_ now.[^my-shortcut] 😭 [^my-shortcut]: For 'sleep' I use Control-Option-L. I use Control-Option for my own global shortcuts because not much else does. L because the shortcut, which triggers Raycast's system action **Sleep Displays**, has the effect of **L**ocking my laptop. I may have inherited this from Windows, where Win-L does the same. I'll grant that you might use F1/F2 for brightness and F10–F12 for volume control. But still, how often? ## Let your apps use them I'm writing an app. Apps work really well with shortcut keys. We all have 12 perfectly great keys right there, begging to be used – and we never do. _'Of course'_, you'll say. _'The user can press the Fn key to access the F-keys'_. And, right, they _can_ do that. But a fraction of people know that this is possible. So they never, ever will. I implore you, then, to change this setting. Go to **Settings** > **Keyboard** > **Keyboard Shortcuts…** > **Function Keys**. Turn on **Use F1, F2, etc. keys as standard function keys**. And there you go. Previously you had 66 usable keys. Now you have 78.