Allow multiple lines to be selected and edited at once with Alt+mouse drag. Ala Visual Studio Code or Notepad++
Multiple selections (multi-cursor)
VS Code supports multiple cursors for fast simultaneous edits. You can add secondary cursors (rendered thinner) with Alt+Click. Each cursor operates independently based on the context it sits in. A common way to add more cursors is with Ctrl+Alt+Down or Ctrl+Alt+Up that insert cursors below or above.
https://code.visualstudio.com/docs/editor/codebasics#_multiple-selections-multicursor