How To Remap Keys On Your Mac

When Apple designed the MacBook keyboards, they were probably thinking of which commands we will be using the most when they assigned shortcuts to specific functions, but as with everything else that is being used by millions of people, actual usage does not always align with intended purpose, so many default keys are left unused while some missing keys remain desired. If you have a lot of unused keyboard shortcuts yourself and would like to replace their functions with something that you actually use, below is a guide on how to remap keys on your Mac.

Which Keys Can You Remap?

There are several sets of keys on your Mac keyboard that perform individual functions. You can modify the functions of some keys, but there are some that you cannot. Among the sets of keys that the functions of which you can easily change and remap according to your needs are the function and modifier keys.
The function keys are usually located at the top most part of your keyboard and are either marked with a letter F followed by a number (e.g. F1, F2, F3, etc.) or an icon that signifies what they do (e.g. sun icon for brightness and speaker icon for volume).
The modifier keys, on the other hand, are the sets of keys that you use in combination with another key to perform specific functions like the CMD, CTRL, Caps Lock, Shift, and Option keys.

What Do Function Keys Do?

Traditionally, Function keys were designed to work as shortcuts to system-related commands usually buried under convoluted menus and submenus; however, since they are not frequently used by the average user, Function keys have been increasingly remapped to provide quick access to basic customization tools (like brightness or volume control) although their traditional functions have not been completely removed but simply delegated to the backseat instead.*
For example, in the current Mac keyboard design,

  1. Pressing F1 reduces brightness.
  2. Pressing F2 increases brightness.
  3. Pressing F3 lets you switch to “Expose” view to see all running programs or apps.
  4. Pressing F4 gives you quick access to business, communication and Internet tools.
  5. Pressing F7 lets you rewind a video that you were watching.
  6. Pressing F8 displays thumbnails of your current work spaces.
  7. Pressing F9 launches “Mission Control.”
  8. Pressing F10 shows all open windows for the active application.
  9. Pressing F11 hides all open windows and shows the desktop instead.
  10. Pressing F12 shows or hide the dashboard.

 
*To use the traditional functions of the Function keys, you have to press F1 or F2 together with the Fn key.
**F5 and F6 has no specific function attached to it by default.

What Do Modifier Keys Do?

Like Function keys, modifier keys also work as keyboard shortcuts to frequently used commands. Some examples of commands that your modifier keys are assigned to perform by default are:

  1. Command+A which selects all items in the active window
  2. Command+C which copies highlighted items.
  3. Command+X Cuts the selected items
  4. Command+F which opens the “Find” dialog
  5. Command+I  which shows additional information about the currently selected item.
  6. Command+M which minimizes the active window
  7. Command+Z which undoes a previous action
  8. Command+V which pastes items previously cut or copied
  9. Command+O which opens the selected item
  10. Command+W which closes the active window

 
Aside from being used as keyboard shortcuts for system-wide commands, modifier keys can also be used to execute application-specific commands like:

  1. Command+Option+Space which opens the “Spotlight” menu.
  2. Command+Shift+A which opens the “Applications” folder.
  3. Command+Shift+U which opens the “Utilities” folder
  4. Command+Shift+I   which connects you to your iDisk
  5. Shift–Command–(?) which opens the “Help” menu.

 

How to Remap Keys on Your Mac

If you are not happy with the default functions of your Function and Modifier keys, you can easily remap the keys on your Mac to assign keyboard shortcuts according to your specific needs and preferences.
To remap the Function keys and change how they work,
Go to the Apple menu

  1. Open “System Preferences,”
  2. Click on the “Keyboard” tab.
  3. Select “Shortcuts.”
  4. Select “Use all F1, F2, etc. keys as standard function keys.

To remap the modifier keys and assigned new key combinations for shortcuts,

  1. Follow Steps 1 to 3
  2. Click on “Modifier Keys.”
  3. Select the modifier key that the function of which you wish to change.
  4. Choose the new action that you want the modifier key to do when clicked on.

This works for system-wide commands; however, you can also remap keys to perform certain functions while particular certain apps.
To do this,

  1. Follow Steps 1 to 4
  2. Select “App Shortcuts.”
  3. Click on the “Add” button (the one with the plus icon).
  4. Click on “Application”
    1. Choose the application for which you want to use the new keyboard shortcut.
    2. If you can’t find the app that you want on the list, choose “Other” then find the app by using the “Open” dialog (note that some apps do not allow users to create custom keyboard shortcuts).
    3. If you want to use the same shortcut for multiple applications, select “All Applications.”
  1. Go to the “Menu Title” field.
    1. Type the menu command for which you want to create a new shortcut, like “Merge All Windows,” for example.
    2. If the menu command that you wish to make a shortcut for takes several steps to reach, type the menu command in the exact order of steps that you need to do to reach that particular command, with each step separated by the “>” character. For example, if you want to create a shortcut to the “Export to PDF” command, type in “File > Export to PDF” in the “Menu Title” field.
  1. After that, go to the “Keyboard Shortcut” field, then press the combination of keys that you want to use for your custom keyboard shortcut.
  2. Click “Add.”
  3. Follow the same steps if you want to create separate keyboard shortcuts for specific apps.

Just make sure that the new keyboard shortcut that you created isn’t already assigned to another command. Otherwise, it’s not going to work unless you will change the shortcut that was created first. If you don’t know which keyboard shortcuts have already been assigned to which commands, you can use this detailed list for reference.

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