+Increasing this will put systems whose bounding boxes almost touch
+farther apart.
+
+@item aftertitlespace
+Amount of space between title and the first system
+@item beforetitlespace
+Amount of space between last system of the previous piece and the
+title of the next
+@item betweentitlespace
+Amount of space between consecutive titles (eg. the title of the
+book and the title of piece).
+