The amount of vertical space allowed between two design elements or between the top of the type block and the first element; for example, there is often a fixed amount of sinkage between a chapter opener and the first line of text.

Extra white space at the top of a page, usually for a title page or the first page of a chapter.

White space left at the top of a page, in addition to the top margin, most often at the beginning of a chapter. to top

The extra white space at the top of a chapter opener.