Learn Some New Ones! - InteliJ Website
Context Actions
Alt + Enter
Comment out Section
Ctrl + /
Go to Declaration or Usages
Ctrl + B
Surround With
Ctrl + Alt + T
Code Completion
Type-Based Completion
Ctrl + Shift + Space
Complete Statement
Ctrl + Shift + Enter
Cursors
Place Additional Cursor on Click
Shift + Alt + Left Click