We can use several shortcuts to navigate around a project:
We can Find a class using ⌘ O (on Mac) or Ctrl+N (on Windows/Linux).
We can move the caret to a method and use ⌘ B (on Mac) or Ctrl+B (on Windows/Linux) to go to the declaration or usages.
We can also navigate backwards by using ⌘ [ (on Mac) or Ctrl+Alt+Left (on Windows/Linux), or navigate forward: ⌘ ] (on Mac) or Ctrl+Alt+Right (on Windows/Linux).
Use ⇧ ⌘ E (on Mac) or Ctrl+Shift+E (on Windows/Linux) to find Recent Locations.
Or find Last edited location with ⇧ ⌘ ⌫ (on Mac) or Ctrl+Shift+Backspace (on Windows/Linux).
Finally, we can find Recent Files using ⌘ E (on Mac) or Ctrl+E (on Windows/Linux).