Reminder - VS Code - simultaneous edits  (aka Multiple selections / multi cursor)

TL;DR shift command L 

I always see VS code highlighting the same key words while editing, but forget how to use that highlighting for simultaneous edits. So I resort to find and replace

The documentation for multiple selections states

VS Code supports multiple cursors for fast simultaneous edits

 But to me, it's really unclear how you then start editing the selected words. On a mac - it is shift command L (⇧⌘L)