Place Holder Options:

centered

align content vertically to the center

True: add class "align-items-center" to the row div
False: no class

padded

adds padding to the place holder

True: add class "padded" to the place-holder-* div
False: no class

fluid

will make the place holder fill the whole width

True: remove class "continer from the container div"
False: add class container to the container div