⌘O find the class file
⌘⌥O to the designated variable / method
⌘⇧O find all types of files, open files, open the directory, open the directory requires a backslash in front of or behind the contents of the input /
⌘⌥ ← / ⌘⌥ → return / proceed to the operation of a place
⌘⇧⌫ Jump to last edited place
⌘⇧⌫ Jump to last edited place
^H shows the hierarchy of the current class
Formatting code ⌘⌥L
⇥ / ⇧⇥ indent your code / anti-indent your code