Add a tool or some sort of capability to view (minimum) and adjust (nice-to-have) pixel spacing between page elements.
Both for the purposes of creating high-fidelity moqups and communicating UI specs to developers, it would be incredibly useful to have the capability to view (minimum) and adjust (nice-to-have) pixel spacing between page elements. Both vertical and horizontal
Even more amazing would be the ability to click a tool that would overlay dimension info (gutters, padding, with px info and dashed lines to indicate elements) as a 'layer' on top of the mockup. We are creating these manually right now as UI specs for our dev team (I can send you an example if that's helpful), but to have at least the basic portions of it auto-generated would be such a time-saver.
Thanks for considering!