Answers for "how to replace the first 3 characters in vscode"

substitute everything visual studio code

Click on the left bar the search icon
Then with the symbol at the right side of the input field decide if apport the substitution to all files

how to replace text for same words vs code

(1) Select your code

(2) Ctrl+Shift+L (which is editor.action.selectHighlights)

(3) voila, multiple cursors done - type away.