Answer by Vladan for Notepad++ select all, multi-line select at end of each line

This will give us the much-loved function originating from the Sublime Text days as Splitting the Selection into Lines which VSCode also adopted as the command "insertCursorAtEndOfEachLineSelected".

You must install the Notepad++ plugin LuaScript. Then, insert this code into startup.lua.

npp.AddShortcut("Insert Cursor At End Of Selected Lines", "Ctrl+Shift+L", function ()    local cursors = {}    editor:BeginUndoAction()    for i = 0, editor.Selections - 1 do        local firstLine, lastLine = editor:LineFromPosition(editor.SelectionNStart[i]), editor:LineFromPosition(editor.SelectionNEnd[i])        for line = firstLine, lastLine do            cursors[#cursors + 1] = editor.LineEndPosition[line]        end    end    editor:ClearSelections()    for _, cursor in ipairs(cursors) do        editor:AddSelection(cursor, cursor)    end    editor:EndUndoAction()end)