Here's how to use them in PyCharm. Two simple rules:
- To add a cursor, hold an ⌥ (Option) key and click on a place where you want to add a cursor.
- When done with multiple cursor editing, press Escape and you'll be left with a single cursor.
Here's a short video illustrating this feature:
Note: in this particular use case Rename Refactoring is definitely superior to Multiple Cursors. Still a great feature.