A BOX record can appear after a LAYER record has been issued. The BOX record defines one or more rectangular data objects.
The header flags byte is not used.
The BOX record contains the following fields:
|?||[repeat]||repeat for multiple boxes|
The first four integers define a box, and a record can contain multiple box definitions (four integers per box). Each box is given the properties currently in effect, and is assigned to the layer currently in effect.