Expand/Collapse Code block

`Ctrl` + `NumPad +` / `Ctrl` + `NumPad -`

All hotkeys for JetBrains RubyMine (Linux)

General Shortcuts Open Corresponding Tool Window	`Ctrl` + `0..9`
General Shortcuts Save All	`Ctrl` + `S`
General Shortcuts Synchronize	`Ctrl` + `Alt` + `Y`
General Shortcuts Toggle Maximize Editor	`Ctrl` + `Shift` + `F12`
General Shortcuts Go back to Previous Tool Window	`F12`
General Shortcuts Go to Editor	`Esc`
General Shortcuts Hide Active or Last Active Window	`Shift` + `Esc`
General Shortcuts Switch Editor Tabs and IDE Tool Windows	`Ctrl` + `Tab`
General Shortcuts Open Setting Dialog	`Ctrl` + `Alt` + `S`
General Shortcuts Close Current Active Tab	`Ctrl` + `F4`
General Shortcuts Quick Switch Current Scheme	`Ctrl` + `
General Shortcuts Add to Favourites	`Alt` + `Shift` + `F`
General Shortcuts Inspect Current file with Current file	`Alt` + `Shift` + `I`
Find and Replace Find	`Ctrl` + `F`
Find and Replace Replace	`Ctrl` + `R`
Find and Replace Search Everywhere	`Double Shift`
Find and Replace Find Next	`F3`
Find and Replace Find Previous	`Shift` + `F3`
Find and Replace Find in Path	`Ctrl` + `Shift` + `F`
Find and Replace Replace in Path	`Ctrl` + `Shift` + `R`
Editing Shortcuts Basic Code Completion	`Ctrl` + `Spacebar`
Editing Shortcuts Complete Current Statement	`Ctrl` + `Shift` + `Spacebar`
Editing Shortcuts Quick Documentation Lookup	`Ctrl` + `Q`
Editing Shortcuts Brief Info	`Ctrl` + `Mouse Over`
Editing Shortcuts Complete Statement	`Ctrl` + `Shift` + `Enter`
Editing Shortcuts Parameter Information	`Ctrl` + `P`
Editing Shortcuts Override Methods	`Ctrl` + `O`
Editing Shortcuts Generate Code	`Alt` + `Insert`
Editing Shortcuts Move Line(Selection) Up/Down	`Ctrl` + `Shift` + `Up Arrow` / `Down Arrow`
Editing Shortcuts Surround With..(Begin..End etc.)	`Ctrl` + `Alt` + `T`
Editing Shortcuts Comment/Uncomment with Line Comment	`Ctrl` + `/`
Editing Shortcuts Comment/Uncomment with Block Comment	`Ctrl` + `Shift` + `/`
Editing Shortcuts Show Description of Error or Warning at Caret	`Ctrl` + `F1`
Editing Shortcuts Indent Selected Lines	`Tab`
Editing Shortcuts Unindent Selected Lines	`Shift` + `Tab`
Editing Shortcuts Show Intention Actions and Quick Fixes	`Alt` + `Enter`
Editing Shortcuts Reformat Code	`Ctrl` + `Alt` + `L`
Editing Shortcuts Duplicate Current Line	`Ctrl` + `D`
Editing Shortcuts Cut/Copy/Paste Current line to Clipboard	`Ctrl` + `X` / `Ctrl` + `C` / `Ctrl` + `V`
Editing Shortcuts Paste from Buffer	`Ctrl` + `Shift` + `V`
Editing Shortcuts AutoIndent Lines	`Ctrl` + `Alt` + `I`
Editing Shortcuts Delete line at caret	`Ctrl` + `Y`
Editing Shortcuts Start New line	`Shift` + `Enter`
Editing Shortcuts Show Intention Actions/Quick-Fixes	`Alt` + `Enter`
Editing Shortcuts Decrease Current Selection to Previous State	`Ctrl` + `Shift` + `W`
Editing Shortcuts Select Successively Incresing Code blocks	`Ctrl` + `W`
Editing Shortcuts Expand All	`Ctrl` + `Shift` + `NumPad +`
Editing Shortcuts Collapse All	`Ctrl` + `Shift` + `NumPad -`
Editing Shortcuts Expand/Collapse Code block	`Ctrl` + `NumPad +` / `Ctrl` + `NumPad -`
Editing Shortcuts Delete to end word	`Ctrl` + `Del`
Editing Shortcuts Delete to word start	`Ctrl` + `Backspace`
Editing Shortcuts Select till code block end	`Ctrl` + `Shift` + `]`
Editing Shortcuts Select till code block start	`Ctrl` + `Shift` + `[`
Editing Shortcuts Toggle Carnel/Snake Case	`Shift` + `Alt` + `U`
Editing Shortcuts Switch case for Word at Caret or Selected block	`Ctrl` + `Shift` + `U`
Refactoring Copy	`F5`
Refactoring Move	`F6`
Refactoring Rename	`Shift` + `F6`
Refactoring Inline	`Ctrl` + `Alt` + `N`
Refactoring Refactor this Quick List	`Ctrl` + `Alt` + `Shift` + `T`
Refactoring Extract Method	`Ctrl` + `Alt` + `M`
Refactoring Extract Field	`Ctrl` + `Alt` + `F`
Refactoring Extract parameter	`Ctrl` + `Alt` + `P`
Refactoring Extract Constant	`Ctrl` + `Alt` + `C`
Refactoring Extract Variable	`Ctrl` + `Alt` + `V`
Navigation Shortcuts Go to Class	`Ctrl` + `N`
Navigation Shortcuts Go to File	`Ctrl` + `Shift` + `N`
Navigation Shortcuts Go to Symbol	`Ctrl` + `Alt` + `Shift` + `N`
Navigation Shortcuts Next highlighted Error	`F2`
Navigation Shortcuts Previous highlighted Error	`Shift` + `F2`
Navigation Shortcuts Go to Top of Page	`Ctrl` + `PgUp`
Navigation Shortcuts Go to Bottom of Page	`Ctrl` + `PgDn`
Navigation Shortcuts Go to Line	`Ctrl` + `G`
Navigation Shortcuts Recent files Popup	`Ctrl` + `E`
Navigation Shortcuts Select current file/Symbol in any View	`Alt` + `F1`
Navigation Shortcuts Go to Next/Previous Tab	`Alt` + `Left Arrow` / `Alt` + `Right Arrow`
Navigation Shortcuts Go to Declaration	`Ctrl` + `B`
Navigation Shortcuts Go to Type Declaration	`Ctrl` + `Shift` + `B`
Navigation Shortcuts Navigate back/forward	`Ctrl` + `Alt` + `Left Arrow` / `Ctrl` + `Alt` + `Right Arrow`
Navigation Shortcuts Go to last edit location	`Ctrl` + `Shift` + `Backspace`
Navigation Shortcuts Go to super method/super class	`Ctrl` + `U`
Navigation Shortcuts Type Hierarchy	`Ctrl` + `H`
Navigation Shortcuts Toggle Bookmark	`F11`
Navigation Shortcuts Toggle Bookmark with Mnemonic	`Ctrl` + `F11`
Navigation Shortcuts Show Bookmarks	`Shift` + `F11`
Navigation Shortcuts Go to Numbered Bookmark	`Ctrl` + `0..9`
Navigation Shortcuts Show Navigation bar	`Alt` + `Home`
Navigation Shortcuts Edit Source	`F4`
Navigation Shortcuts Show Diagram	`Ctrl` + `Shift` + `Alt` + `U`
Navigation Shortcuts File Structure Popup	`Ctrl` + `F12`
Navigation Shortcuts Move to code block end/start	`Ctrl` + `]` / `Ctrl` + `[`
Navigation Shortcuts Go to Previous/Next Method	`Alt` + `Up Arrow` / `Alt` + `Down Arrow`
Navigation Shortcuts Open Quick Definition Lookup	`Ctrl` + `Shift` + `I`
Debugging Run to Cursor	`Alt` + `F9`
Debugging Step Out	`Shift` + `F8`
Debugging Step Over	`F8`
Debugging Step Into	`F7`
Debugging Quick Evaluate Expression	`Ctrl` + `Alt` + `F8`
Debugging Evaluate Expression	`Alt` + `F8`
Debugging Toggle Breakpoint	`Ctrl` + `F8`
Debugging View Breakpoints	`Ctrl` + `Shift` + `F8`
Debugging Resume Program	`F9`
Debugging Show Execution Point	`Alt` + `F10`
Compile and Run Open Run Configuration	`Alt` + `Shift` + `F10`
Compile and Run Open Debug Configuration	`Alt` + `Shift` + `F9`
Compile and Run Run	`Shift` + `F10`
Compile and Run Debug	`Shift` + `F9`
Compile and Run Run Rake Task	`Ctrl` + `Alt` + `R`
Usage Search Find Usage in File	`Ctrl` + `F7`
Usage Search Find Usage	`Alt` + `F7`
Usage Search Highlight Usage in File	`Ctrl` + `Shift` + `F7`
Usage Search Show Usage	`Ctrl` + `Alt` + `F7`
VCS/Local History View Diffrenece	`Ctrl` + `D`
VCS/Local History Commit Project to VCS	`Ctrl` + `K`
VCS/Local History Update Project from VCS	`Ctrl` + `T`
VCS/Local History View Recent Changes	`Ctrl` + `Shift` + `E`
VCS/Local History VCS Operations Popup	`Alt` + `
Live Templates Insert Live Template	`Ctrl` + `J`
Live Templates Surround with Live Template	`Ctrl` + `Alt` + `J`
Rails Navigate to Rails Model/View/Controllers	`Alt` + `Shift` + `N`
Rails Preview Rails View in Browser	`Alt` + `F2`
Rails Reload Application Sources in Rails Console	`Ctrl` + `R`
Rails Insert in RHTML	`Ctrl` + `Shift` + `.`
Rails Run Rails Generator	`Ctrl` + `Alt` + `G`