any way to "preview" patterns before enabling them?

Just got my lights set up and now playing with WLED :) Is there any way to have the "Peek" mode so that I can preview the effects and colours before actually setting the lights to be that effect/colour?

Edit for those downvoting this post: I know about Peek mode; that just shows what's currently being displayed on the lights, as far as I'm aware. I'm asking about a way to preview the patterns without them being displayed on the actual lights.