Set keyboard shortcuts

To change the key or keys to be pressed for a keyboard shortcut:

Open the Activities overview and start typing Keyboard.
Click on Keyboard to open the panel.
Select the Shortcuts tab.
Select a category in the left pane, and the row for the desired action on the right. The current shortcut definition will change to New accelerator…
Hold down the desired key combination, or press Backspace to clear.

Pre-defined shortcuts

There are a number of pre-configured shortcuts that can be changed, grouped into these categories:

Launchers

Launch help browser	Disabled
Launch calculator	or `Calculator`
Launch email client	or `Mail`
Launch web browser	or or `WWW`
Home folder	or or `Explorer`
Search	or `Search`

Navigation

Move window to workspace 1	Disabled
Move window to workspace 2	Disabled
Move window to workspace 3	Disabled
Move window to workspace 4	Disabled
Move window one workspace to the left	`Shift`+`Ctrl`+`Alt`+`←`
Move window one workspace to the right	`Shift`+`Ctrl`+`Alt`+`→`
Move window one workspace up	`Shift`+`Super`+`Page Up`
Move window one workspace down	`Shift`+`Super`+`Page Down`
Switch applications	`Super`+`Tab`
Switch windows	Disabled
Switch windows of an application	Disabled
Switch system controls	`Ctrl`+`Alt`+`Tab`
Switch windows directly	`Alt`+`Esc`
Switch windows of an app directly	`Alt`+`F6`
Switch system controls directly	`Ctrl`+`Alt`+`Esc`
Hide all normal windows	Disabled
Switch to workspace 1	Disabled
Switch to workspace 2	Disabled
Switch to workspace 3	Disabled
Switch to workspace 4	Disabled
Move to workspace left	`Ctrl`+`Alt`+`←`
Move to workspace right	`Ctrl`+`Alt`+`→`
Move to workspace above	`Super`+`Page Up`
Move to workspace below	`Super`+`Page Down`

Screenshots

Save a screenshot to file	`Print`
Save a screenshot of a window to file	`Alt`+`Print`
Save a screenshot of an area to file	`Shift`+`Print`
Copy a screenshot to clipboard	`Ctrl`+`Print`
Copy a screenshot of a window to clipboard	`Ctrl`+`Alt`+`Print`
Copy a screenshot of an area to clipboard	`Shift`+`Ctrl`+`Print`
Record a screencast	`Shift`+`Ctrl`+`Alt`+`R`

Sound and Media

Volume mute	(Audio mute)
Volume down	(Audio lower volume)
Volume up	(Audio raise volume)
Launch media player	(Audio media)
Play (or play/pause)	(Audio play)
Pause playback	(Audio pause)
Stop playback	(Audio stop)
Previous track	(Audio previous)
Next track	(Audio next)
Eject	(Eject)

System

Show the run command prompt	`Alt`+`F2`
Show the activities overview	`Alt`+`F1`
Log out	`Ctrl`+`Alt`+`Delete`
Lock screen	`Super`+`L`
Show the message tray	`Super`+`M`
Focus the active notification	`Super`+`N`
Show all applications	`Super`+`A`
Open the application menu	`Super`+`F10`

Typing

Switch to next input source	`Super`+`Space`
Switch to previous input source	Disabled
Modifiers-only switch to next source	Disabled
Compose Key	Disabled
Alternative Characters Key	Disabled

Universal Access

Turn zoom on or off	`Alt`+`Super`+`8`
Zoom in	`Alt`+`Super`+`=`
Zoom out	`Alt`+`Super`+`-`
Turn screen reader on or off	Disabled
Turn on-screen keyboard on or off	Disabled
Increase text size	Disabled
Decrease text size	Disabled
High contrast on or off	Disabled

Windows

Activate the window menu	`Alt`+`Space`
Toggle fullscreen mode	Disabled
Toggle maximization state	`Alt`+`F10`
Maximize window	`Super`+`↑`
Restore window	`Super`+`↓`
Toggle shaded state	Disabled
Close window	`Alt`+`F4`
Hide window	`Super`+`H`
Move window	`Alt`+`F7`
Resize window	`Alt`+`F8`
Toggle window on all workspaces or one	Disabled
Raise window if covered, otherwise lower it	Disabled
Raise window above other windows	Disabled
Lower window below other windows	Disabled
Maximize window vertically	Disabled
Maximize window horizontally	Disabled
View split on left	`Super`+`←`
View split on right	`Super`+`→`

Custom shortcuts

To create your own application keyboard shortcut in the Keyboard settings:

Click the + button. The Custom Shortcut window will appear.
Type a Name to identify the shortcut, and a Command to run an application, then click Add. For example, if you wanted the shortcut to open Rhythmbox, you could name it Music and use the rhythmbox command.
Click Disabled in the row that was just added. When it changes to New accelerator…, hold down the desired shortcut key combination.

The command name that you type should be a valid system command. You can check that the command works by opening a Terminal and typing it in there. The command that opens an application cannot have the same name as the application itself.

If you want to change the command that is associated with a custom keyboard shortcut, double-click the name of the shortcut. The Custom Shortcut window will appear, and you can edit the command.

Ubuntu Documentation