Right now, the multiple selection editing in NP++ is lacking in functionality. There are bugs and it doesn't work as good as it does in Sublime. I'd like it to work as it does in the other program:
"Select some text and press Ctrl + D to add more instances. If you want to skip the current instance, press Ctrl + K, Ctrl + D.
If you go too far, press Ctrl + U to deselect the current instance."