Simple Spacer

Very simple spacer that allows the height of the space to be chosen using direct input or slider. The unit can be picked from the default px and other options em, vw, vh. A simple tickbox option will enable the highlight of the spacer in edit mode so you can instantly identify where you have used it. Any highlighted spacer will show the height and unit within the space (in edit mode only) apart from if the space is designated in pixels and is under 16px.