I've only used WoS on android where it pops up automatically when you go to zap someone. Alternatively, if the person has a lightning URL, copy that, open WoS and click the ⚡ icon at the bottom, paste in the URL of the person you're trying to zap.

It's been quite awhile since I've used WoS. I remember it being a bit of a pain to do exactly what you're trying to do. I eventually switched to Zeus and Enuts.

I hope I was somewhat helpful. 🤙🏾🖖🏾⚡