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

You can do this with the column mode. This functionality is enabled by default.To switch to column mode, there are two ways to do it:Alt + Shift + Arrow keysor:Alt + Mouse draggingTo use the keyboard, you need to use the Alt + Shift + Arrow keys. By using the keyboard you have more control over which words or characters you want to work with.