How to Use Multi Cursor ?
Using Multi Cursor
MultiCursor is one the best features of Visual Studio Code. this feature lets you to edit multiple places at the same time.
In addition, if the expression you selected in one line in Visual Studio Code is repeated in other lines, the code editor finds them and makes them visible to you. The multi-cursor feature allows you to select the same expressions with a combination of CTRL + D and change them at once.
lastly, you can press ESC to quit multicursor
source : Patika