What's the trick to inspect popout / dropdown menu style with Firebug?

Is there a way to make a popout menu 'stick' when inspecting with Firebug.

You can do it with Chrome, but I prefer firebug.

It's hard to set padding or a margin when you can't see the element you are styling.

I d开发者_如何学JAVAid some research but couldn't figure it out.

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There's an option built in:

Inspect the element that's "hidden", then use this.

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You can show/hide them using JS console, directly using show() or binding an event(mouseover, click etc).