Idea - Shortcut

Shortcut

Suggestion

Alt + Enter
Shift+F10 (Context Menu. Settings > Key Map > Show Context Menu)

File / Class

Open recently: Ctrl + E
Open recently edited: Ctrl + Shift + E
Class: Ctrl + N
Directory: Ctrl + Shift + N

Code

Import: Ctrl + Alt + O
Format: Ctrl + Alt + L

F8: Next error
Ctrl + Alt + arrow: Navigate within code cursor position
Alt + Arrow: Navigate to the next function/methode
Ctrl+f12 : File Structure Popup

Selection

Ctrl + W: select a word
Ctrl + W + W: select the statement
… And so on

Refactoring

Ctrl + Alt + V: Extract Variable

Line Management

New Line everywhere: Shift + Enter
Remove a line: Ctrl + Y
Duplicate: Ctrl + D
Moving: Shift + Alt + Arrow

Statement / Method

Moving: Ctrl + Ship + Arrow

Find

Ctrl + B: Find declaration
Alt+F7: Find usage

Viewing

At caret, Viewing

Ctrl+Shift+I: The definition of a symbol
Ctrl+Q: Intern documentation for a symbol
Shift+F1: Documentation in browser (External Doc)
Ctrl+P: Method Parameter Information