General

Double Shift
Search everywhere

Alt + #[0-9]
Open corresponding tool window

Ctrl + Alt + S
Open Settings dialog

Ctrl + Tab
Switch between tabs and tool window


- Editing

Ctrl + Space
Basic code completion

Alt + Enter
Show intention actions and quick-fixes

Ctrl + P
Parameter info (Within method call arguments)

Ctrl + Q
Quick documentation lookup

Ctrl + mouse over code
Brief info

Alt + Insert
Generate code... (Getters, Setters, Constructors)

Ctrl + O
Override methods

Ctrl + I
Implement methods

Ctrl + Alt + T
Surround with... (if..else, try..catch, for, etc.)

Ctrl + /
Comment/uncomment with line comment

Ctrl + Shift + /
Comment/uncomment with block comment

Ctrl + W
Select successively increasing code blocks

Ctrl + Shift + W
Decrease current selection to previous state

Ctrl + Alt + L
Reformat code

Ctrl + D
Duplicate current line or selected block

Ctrl + Y
Delete line at caret

Shift + Enter
Start new line

Ctrl + Shift + U
Toggle case for word at caret or selected block

Ctrl + Shift + ] / [
Select till code block end/start

Ctrl + NumPad+/-
Expand/collapse code block

Ctrl + F4
Close active editor tab


Navigation

Ctrl + G
Go to line

Alt + Right / Left
Go to next/previous editor tab

Ctrl + E
Recent files popup

Ctrl + Shift + Backspace
Navigate to last edit location

Ctrl + B or Ctrl + Click
Go to declaration

Ctrl + Alt + B
Go to implementation(s)

Ctrl + Shift + B
Go to type declaration

Ctrl + U
Go to super-method/super-class

Alt + Up / Down
Go to previous/next method

Ctrl + ] / [
Move to code block end/start

F2 / Shift + F2
Next/previous highlighted error


Refactoring

F5 / F6
Copy/Move

Alt + Delete
Safe delete

Shift + F6
Rename

Ctrl + Alt + N
Inline variable

Ctrl + Alt + M / V / F / C
Extract Method/Variable/Field/Constant

Ctrl + Alt + Shift + T
Refactor this (Shows all available refactorings)


Search / Replace

Ctrl + F / R
Find/Replace

F3 / Shift + F3
Find next/previous

Ctrl + Shift + F / R
Find/Replace in path


Debugging

F7
Step into

F8
Step over

Shift + F8
Step out

Alt + F8
Evaluate expression

F9
Resume program

Ctrl + F8
Toggle breakpoint

Ctrl + Shift + F8
View breakpoints


Running

Shift + F10
Run

Shift + F9
Debug

Ctrl + Shift + F10
Run context configuration from editor

Ctrl + Shift + X
Run command line


VCS / Local history

Alt + ` (Backtick)
VCS quick popup

Ctrl + K
Commit project to VCS

Ctrl + T
Update project from VCS

Alt + Shift + C
View recent changes


Live templates

Ctrl + J
Insert live template

eco
echo statement

fore
foreach (iterable_expr as $value) {...}

forek
foreach (iterable_expr as $key => $value) {...}

fori
for ($i = 0; $i < ; $i++) {...}

inc / inco
include/include_once statement

rqr / rqro
require/require_once statement

fun
function () {...}

prif
private function

prisf
private static function

prof
protected function

prosf
protected static function

pubf
public function

pubsf
public static function


Source: Orkhan Alishov's notes