Interface: PrintableArea

Chassis-physical dead-zone insets around the printable rectangle.

Insets the printhead physically cannot reach — head-to-cutter offsets, head-vs-tape-width geometry, sensor-window keep-outs. Encoders consume this to crop / shift the bitmap so authored content lands where the user expects.

Distinct from MediaDescriptor.printMargins (per-media design-tool inset, conservative of the chassis floor), from PrintEngine.forcedTrailingFeedMm (post-print tape advance), and from any wire-protocol "feed margin" command the firmware enacts on its own (Brother QL/PT ESC i d).

Field naming is print-direction-relative, not bitmap-coordinate- relative — leading / trailing survive 90° rotations the driver applies before encoding, where top / bottom would invert.

Properties

Property	Modifier	Type	Description
leading	readonly	number	Unprintable strip at the leading edge of the print, in mm.
left	readonly	number	Unprintable strip at the left side of the head, in mm.
right	readonly	number	Unprintable strip at the right side of the head, in mm.
trailing	readonly	number	Unprintable strip at the trailing edge of the print, in mm.