I have data edit controller similar to the EditableDetailView sample from the SDK. The view shows only the fields with values in the non-editing mode and in editing mode it adds the unpopulated fields too as placeholders. Unlike the SDK example the set of fields is fixed so no new placeholers have to be added during edit. My question is whether should I should place the green + Insert next to my empty field placeholders or not? A click the + would populate the placeholder next to it, but it would not add a new empty placeholder. The HIG is not clear on this topic. If I do add the + it looks better because all fields have an indicator (red - or green +), but I'm concerned that the '+' action does not actually add a new placeholder. If I leave the + out it looks odd as some fields have the red - and other have nothing.