Navigte between code editor and Project

What is the keybind (its name and shortcut) to navigate between code editor and Project view - where your packages and classes are.

By this i mean, if I  click with the mouse on the package manger I can use my keyboard arrows to navigate the package manager and if I click with my mouse on the editor I can use my keyboard arrow keys to navite the code there. How do I skip this mouse click?

Basically the way you can use ALT + F12 to focus terminal and then press it again to focus edit or press escape. I want the same thing, but for project