Which shortcut keys in idea are more helpful for work?

1. Known method name, how to quickly query: Double-click the shift key, enter the method name.
2. Search class (enter class name): Ctrl+shift+N
3. Ctrl+alt+B View the implementation class of the interface
4. Ctrl+/ comment (// or /…/)
5. Format code CTRL+ALT+L
6. Jump to the location of the historical cursor Ctrl + Alt + ←/→
7. Quickly modify method names, variable names, file names, class names, etc. Shift + F6;
8. You can list where variables are used Alt + F7