TransformBox

Transform a naturally measured child using an affine matrix [a,b,c,d,e,f]: x′=ax+cy+e, y′=bx+dy+f. Default is identity. A canvas child needs its own finite dimensions.

Property	Default	Meaning
matrix	[1, 0, 0, 1, 0, 0]	Affine transform [a,b,c,d,e,f]
resize	true	Resize and translate the wrapper to the transformed bounds

resize defaults to true: transformed bounds set natural size, translated to the local origin. resize=false keeps the original frame and reports overflow. Exact allocations override wrapper size and center the transformed bounds in that frame. The finished geometry, including fonts and strokes, is transformed. Rotate provides angles and fitting fits content into an offer.

Named vertical guides, including baseline and math axis, transform when b is zero and a horizontal line stays horizontal. A transform that tilts those lines omits the wrapper's guides; the placed child's original guides remain available.