marklife / core/src / ROTATE_DIRECTION
Variable: ROTATE_DIRECTION
constROTATE_DIRECTION:RotateDirection=90
Marklife chassis rotate landscape input clockwise (90).
Direct-thermal heads are mounted with the leading edge at the top — same as labelife's TSPL/ESC chassis. Confirm once on hardware with a landscape "F" print on 50 × 30 mm gap stock.