If you could hold a key and click on elements in the editor window to use an element as if its in preview/live mode. This would make the editing process much quicker, especially form elements like sliders, tabbed content and navigations. As opposed to jumping into preview mode or doing multiple clicks in the right area

Admin Note:
Since this functionality is available in Preview mode and on the published site, it's unlikely that we'll add this functionality without many more votes at this time.