Optionalbackgroundwhether the background is visible
the currently-selected layer's crdt id
the block's current version (selects the point encoding for lines)
the unread tail of the block, preserved for round-tripping
the block's minimum reader version
Optionalpaperthe page size in device pixels, if present
Optionalrootwhether the underlying document is visible
the block-type discriminant
the
0x0dscene info block