`Attrib` gains optional per-attribute properties (`props`), each overriding
the attribute definition's. DXF reading takes them from the ATTRIB's groups
8/6/62/420/370; writing gives each ATTRIB the properties it is drawn with.
The renderer prefers them over the definition's. -ATTEDIT's Layer and Color
options set them; ATTSYNC resets them to the definitions, as in AutoCAD.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
- A dimension on a layer with a viewport colour override now takes the
override inside that viewport (dimension and extension lines, arrows,
text), like every other object.
- A LEADER's arrowhead is DIMASZ x DIMSCALE of the leader's dimension
style; the drawing's DIMSCALE only applies when the style's is 0 (as
for dimensions), and both 0 no longer gives a zero-size arrow.
- Attributes are drawn with the properties of their attribute
definition, which AutoCAD copies to the attribute on insertion:
ByLayer = the definition's layer (layer 0 = the block reference's
layer), ByBlock = the block reference's colour and lineweight,
explicit colours and lineweights as set. An attribute on an off or
frozen layer is hidden. Attributes without a definition keep the block
reference's colour and now its lineweight too, instead of 0.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
