1. Adjust font size
After the latest version of pycharm is installed, the shortcut keys to adjust the font size are Shift+Alt+. (larger), Shift+Alt+, (smaller)
Two, run
Ctrl+Shift+F10
3. Automatic formatting
Ctrl+Alt+L
Four, multi-line comments
Enter three double quotes before and after the code or select the content that needs to be commented - press Ctrl+/
5. Add various libraries
File——settings——Project:xxx——Project Interpreter——+ in the upper right corner——search for whatever you need