Labeled Audio > Join

`Alt` + `J`

All hotkeys for Audacity

File menu New	`Ctrl` + `N`
File menu Open	`Ctrl` + `O`
File menu Close	`Ctrl` + `W`
File menu Save Project	`Ctrl` + `S`
File menu Import > Audio	`Ctrl` + `↑ Shift` + `I`
File menu Export Audio	`Ctrl` + `↑ Shift` + `E`
File menu Export Multiple	`Ctrl` + `↑ Shift` + `L`
File menu Exit	`Ctrl` + `Q`
Edit menu Undo	`Ctrl` + `Z`
Edit menu Redo	`Ctrl` + `Y`
Edit menu (Mac/Linux) Undo	`Ctrl` + `↑ Shift` + `Z`
Edit menu Cut	`Ctrl` + `X`
Edit menu Delete	`Ctrl` + `K`
Edit menu Remove Special > Split Cut	`Ctrl` + `Alt` + `X`
Edit menu Remove Special > Split Delete	`Ctrl` + `Alt` + `K`
Edit menu Remove Special > Silence Audio	`Ctrl` + `L`
Edit menu Remove Special > Trim Audio	`Ctrl` + `T`
Edit menu Clip Boundaries > Split	`Ctrl` + `I`
Edit menu Clip Boundaries > Split New	`Ctrl` + `Alt` + `I`
Edit menu Clip Boundaries > Join	`Ctrl` + `J`
Edit menu Clip Boundaries > Detach at Silences	`Ctrl` + `Alt` + `J`
Edit menu Copy	`Ctrl` + `C`
Edit menu Paste	`Ctrl` + `V`
Edit menu Paste Text to New Label	`Ctrl` + `Alt` + `V`
Edit menu Duplicate	`Ctrl` + `D`
Edit menu Labeled Audio > Cut	`Alt` + `X`
Edit menu Labeled Audio > Delete	`Alt` + `K`
Edit menu Labeled Audio > Split Cut	`↑ Shift` + `Alt` + `X`
Edit menu Labeled Audio > Split Delete	`↑ Shift` + `Alt` + `K`
Edit menu Labeled Audio > Silence Audio	`Alt` + `L`
Edit menu Labeled Audio > Copy	`↑ Shift` + `Alt` + `C`
Edit menu Labeled Audio > Split	`Alt` + `I`
Edit menu Labeled Audio > Join	`Alt` + `J`
Edit menu Labeled Audio > Detach at Silences	`↑ Shift` + `Alt` + `J`
Edit menu Select > All	`Ctrl` + `A`
Edit menu Select > None	`Ctrl` + `↑ Shift` + `A`
Edit menu Select > Spectral > Toggle Spectral Selection	`Q`
Edit menu Select > Left at Playback Position	`[`
Edit menu Select > Right at Playback Position	`]`
Edit menu Select > Track Start to Cursor	`↑ Shift` + `J`
Edit menu Select > Cursor to Track End	`↑ Shift` + `K`
Edit menu Select > In All Tracks	`Ctrl` + `↑ Shift` + `K`
Edit menu Select > In All Sync-Locked Tracks	`Ctrl` + `↑ Shift` + `Y`
Edit menu Find Zero Crossings	`Z`
Transport menu Short Seek Left during Playback (1 second)	`←`
Transport menu Short Seek Right during Playback(1)	`→`
Edit menu Move Cursor to Track Start	`J`
Edit menu Move Cursor to Track End	`K`
Edit menu Preferences	`Ctrl` + `P`
Edit menu (Mac) Preferences	`⌘ Cmd` + `,`
Edit menu Move to and open Next Label	`⭾ Tab`
Edit menu Move to and open Previous Label	`↑ Shift` + `⭾ Tab`
Transport menu Move Cursor to Previous Label	`Alt` + `←`
Transport menu Move Cursor to Next Label	`Alt` + `→`
Edit menu Selection to Start	`↑ Shift` + `Home`
Edit menu Selection to End	`↑ Shift` + `End`
Edit menu Delete Key	`⬅ Backspace`
Edit menu Delete Key	`Del`
Transport menu Long Seek Left during Playback (15 seconds)	`↑ Shift` + `←`
Transport menu Long Seek Right during Playback (15 seconds)	`↑ Shift` + `→`
Edit menu Selection Contract Left	`Ctrl` + `↑ Shift` + `←`
Edit menu Selection Contract Right	`Ctrl` + `↑ Shift` + `→`
Transport menu Short Seek Left during Playback (1 second)	`,`
Transport menu	`.`
Transport menu Long Seek Left during Playback (15 seconds)	`↑ Shift` + `,`
Transport menu Long Seek Right during Playback (15 seconds)	`↑ Shift` + `.`
View menu Zoom In	`Ctrl` + `1`
View menu Zoom Normal	`Ctrl` + `2`
View menu Zoom Out	`Ctrl` + `3`
View menu Zoom to Selection	`Ctrl` + `E`
View menu Fit In Window	`Ctrl` + `F`
View menu Fit Vertically	`Ctrl` + `↑ Shift` + `F`
View menu Go to Selection Start	`Ctrl` + `[`
View menu Go to Selection End	`Ctrl` + `]`
View menu Collapse All Tracks	`Ctrl` + `↑ Shift` + `C`
View menu Expand Collapsed Tracks	`Ctrl` + `↑ Shift` + `X`
View menu Full screen on/off	`F11`
View menu (Mac) Full screen on/off	`⌘ Cmd` + `/`
Transport menu Play/Stop	`Space`
Transport menu Play/Stop and Set Cursor	`X`
Transport menu Loop Play	`↑ Shift` + `Space`
Transport menu Pause	`P`
Transport menu Skip to Start	`Home`
Transport menu Skip to End	`End`
Transport menu Record	`R`
Transport menu Timer Record...	`↑ Shift` + `T`
Transport menu Append Record	`↑ Shift` + `R`
Transport menu Play One Second	`1`
Transport menu Play To Selection	`B`
Transport menu Play Cut Preview	`C`
Transport menu Play short period before selection start	`↑ Shift` + `F5`
Transport menu Play short period after selection start	`↑ Shift` + `F6`
Transport menu Play short period before selection end	`↑ Shift` + `F7`
Transport menu Play short period after selection end	`↑ Shift` + `F8`
Transport menu Play short period before and after selection start	`Ctrl` + `↑ Shift` + `F5`
Transport menu Play short period before and after selection end	`Ctrl` + `↑ Shift` + `F7`
Tracks menu Add New > Mono Track	`Ctrl` + `↑ Shift` + `N`
Tracks menu Mix and Render to New Track	`Ctrl` + `↑ Shift` + `M`
Tracks menu Mute All Tracks	`Ctrl` + `U`
Tracks menu Unmute All Tracks	`Ctrl` + `↑ Shift` + `U`
Tracks menu Add Label at Selection	`Ctrl` + `B`
Tracks menu Add Label at Playback Position	`Ctrl` + `M`
Tracks menu (Mac) Add Label at Playback Position	`⌘ Cmd` + `.`
Tracks menu Move Focus to First Track	`Ctrl` + `Home`
Tracks menu Move Focus to Last Track	`Ctrl` + `End`
Tracks menu Move Focus to Previous Track	`↑`
Tracks menu Move Focus to Previous and Select	`↑ Shift` + `↑`
Tracks menu Move Focus to Next Track	`↓`
Tracks menu Move Focus to Next and Select	`↑ Shift` + `↓`
Tracks menu Toggle Focused Track	`⤶ Enter`
Tracks menu Remove Focused track	`↑ Shift` + `C`
Audio track dropdown menu Open menu on focused track	`↑ Shift` + `M`
Audio track dropdown menu Mute/Unmute focused track	`↑ Shift` + `U`
Audio track dropdown menu Solo/Unsolo focused track	`↑ Shift` + `S`
Audio track dropdown menu Change gain on focused track	`↑ Shift` + `G`
Audio track dropdown menu Increase gain on focused track	`Alt` + `↑ Shift` + `↑`
Audio track dropdown menu Decrease gain on focused track	`Alt` + `↑ Shift` + `↓`
Audio track dropdown menu Change pan on focused track	`↑ Shift` + `P`
Audio track dropdown menu Pan left on focused track	`Alt` + `↑ Shift` + `←`
Audio track dropdown menu Pan right on focused track	`Alt` + `↑ Shift` + `→`
Device toolbar Change Audio Host	`↑ Shift` + `H`
Device toolbar Change Playback Device	`↑ Shift` + `O`
Device toolbar Change Recording Device	`↑ Shift` + `I`
Device toolbar Change Recording Channels	`↑ Shift` + `N`
Tools toolbar Chooses Selection tool	`F1`
Tools toolbar Chooses Envelope tool	`F2`
Tools toolbar Chooses Draw tool	`F3`
Tools toolbar Chooses Zoom tool	`F4`
Tools toolbar Chooses Time Shift tool	`F5`
Tools toolbar Chooses Multi-tool	`F6`
Tools toolbar Next tool	`D`
Tools toolbar Previous tool	`A`
Keyboard focus Move backward through currently focused toolbar in Upper Toolbar dock area, Track View and currently focused toolbar in Lower Toolbar dock area	`Ctrl` + `↑ Shift` + `F6`
Keyboard focus Move forward through currently focused toolbar in Upper Toolbar dock area, Track View and currently focused toolbar in Lower Toolbar dock area	`Ctrl` + `F6`
Keyboard focus Move backward through modeless windows, undocked Toolbars and the main project window	`Alt` + `↑ Shift` + `F6`
Keyboard focus Move forward through modeless windows, undocked Toolbars and the main project window	`Alt` + `F6`