Register is a term that refers to pictographic representation of a scene, and its separation from an adjoining scene by putting the scene in regestered sections. This term can be applied in sculpture, or ancient artwork, or languages. Scenes are typically separated by lines, with each straight line separating the scenes into Block registers.
Luwian language hieroglyphs were also represented in stone art, in registers. Another example, in Mesopotamian art, would be the stones called, Kudurru, or boundary stones, which often had registers of gods on the upper registers of the scenes.