how to replace all in visual studio code example

Example 1: visual studio find and replace

//Press Ctrl+F as a shortcut to find a string in the current file.
//Press Ctrl+H as a shortcut to find and replace a string in the current file.

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