Recursively expand / collapse directories

`Option` + `Arrow Left` / `Arrow Right` / `Command` + `Option` + `[` / `]`

All hotkeys for Atom (text editor) 1.0 (MacOS)

General Preferences	`Command` + `,`
General Toggle command palette	`Command` + `Shift` + `P`
General Browse list of open files	`Command` + `B`
General Reload Atom	`Command` + `Option` + `R`
General Change synatx highlighting	`Command` + `Shift` + `L`
General Show available code snippets	`Option` + `Shift` + `S`
General Markdown preview	`Command` + `Shift` + `M`
General Toggle Developer Tools	`Command` + `Option` + `I`
File Management New file	`Command` + `N`
File Management New Window	`Command` + `Shift` + `N`
File Management Open file (type the name to perform a search)	`Command` + `P`
File Management Open file	`Command` + `O`
File Management Open folder	`Command` + `Shift` + `O`
File Management Save	`Command` + `S`
File Management Save as	`Command` + `Shift` + `S`
File Management Close tab	`Command` + `W`
File Management Close window	`Command` + `Shift` + `W`
Editing Lines Go to line	`Command` + `G`
Editing Lines Select line	`Command` + `L`
Editing Lines Duplicate line	`Command` + `Shift` + `D`
Editing Lines Delete line	`Command` + `Shift` + `K`
Editing Lines Move line up/down	`Command` + `Arrow Up` / `Arrow Down`
Editing Lines Toggle comment line	`Command` + `/`
Editing Lines New line below	`Command` + `Return`
Editing Lines Indent / outdent selected lines	`Command` + `[` / `]`
Editing Lines Join lines	`Command` + `J`
Editing Words and Brackets Move to beginning / end of current word	`Option` + `B` / `F`
Editing Words and Brackets Select to beginning / end of current word	`Option` + `Shift` + `B` / `F`
Editing Words and Brackets Delete to beginning of current word	`Command` + `Del` / `Option` + `H`
Editing Words and Brackets Delete to end of current word	`Command` + `Delete` / `Option` + `D`
Editing Words and Brackets Complete bracket	`Command` + `Option` + `.`
Editing Words and Brackets Go to matching bracket	`Command` + `M`
Editing Words and Brackets Select code inside matching brackets	`Command` + `Option` + `M`
Code Folding Fold all code at indent level 1 ... 9	`Command` + `K` then `Command` + `1 ... 9`
Code Folding Fold / unfold code	`Command` + `Option` + `/`
Code Folding Fold selected code	`Command` + `Option` + `F`
Code Folding Fold / unfold all code	`Command` + `Option` + `[` / `]`
Find and Replace Find in current file	`Command` + `F`
Find and Replace Find in project	`Command` + `Shift` + `F`
Find and Replace Find next	`F3`
Find and Replace Find previous	`Shift` + `F3`
Find and Replace Replace all	`Command` + `Enter`
Find and Replace Use Regex in search	`Command` + `Option` + `/`
Find and Replace Match case in search	`Command` + `Option` + `C`
Find and Replace Search only in selection	`Command` + `Option` + `S`
Find and Replace Match whole word	`Command` + `Option` + `W`
View Increase / decrease text size	`Command` + `Shift` + `=` / `-`
View Reset text size	`Command` + `0`
View Toggle fullscreen	`F11`
Tree View Toggle focus Tree View	`Command` + `0` / `Option` + `\`
Tree View Toggle tree view	`Command` + `K` then `B` or `Command` + `\`
Tree View Select next/previous item	`J` / `K`
Tree View Expand / collapse selected directory	`H` / `L` OR `Arrow Right` / `Arrow Left`
Tree View Recursively expand / collapse directories	`Option` + `Arrow Left` / `Arrow Right` / `Command` + `Option` + `[` / `]`
Tree View Open selected item	`Return`
Tree View Move selected item	`M` / `F2`
Tree View Delete current item	`Del` / `Delete`
Tree View Duplicate selected item	`D`
Tree View Open selected item in pane 1 ... 9	`Command` + `1 ... 9`
Tree View Add new file	`A`
Tree View Add new folder	`Shift` + `A`
Tree View Toggle display of VCS ignored files	`I`
Github Integration Open on Github: blame	`Option` + `G` , then `B`
Github Integration Open on Github: copy-url	`Option` + `G` , then `C`
Github Integration Open on Github: repository	`Option` + `G` , then `G`
Github Integration Open on Github: history	`Option` + `G` , then `H`
Github Integration Open on Github: issues	`Option` + `G` , then `I`
Github Integration Open on Github: file	`Option` + `G` , then `O`
Github Integration Open on Github: branch-compare	`Option` + `G` , then `R`
Manage Diffs Toggle list of diffs in file	`Option` + `G` , then `D`
Manage Diffs Move to next/previous diff in file	`Option` + `G` , then `Arrow Down` / `Arrow Up`