how to edit a word in the whole document in vscode code example

Example 1: multiple word select in vs code

//Selects the word at the cursor, or the next occurrence of the current selection.
Ctrl+D 

//To add cursors to all the occurrences of a highlighted word 
Ctrl+Shift+L 
//Then select all occurrences of that word

Example 2: 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

Example 3: 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.