OptionalalignGroup code 46: align space.
OptionalannotativeGroup code 296: annotative flag.
OptionalarrowheadGroup code 341: arrowhead ID (handle reference).
OptionalarrowheadGroup code 44: arrowhead size.
OptionalblockGroup code 94: block content color (DXF raw int32).
OptionalblockGroup code 177: block content connection type.
OptionalblockGroup code 343: block content ID (handle reference).
OptionalblockGroup code 141: block content rotation.
OptionalblockGroup code 294: enable block content rotation.
OptionalblockGroup codes 47/49/140: block content scale on X/Y/Z axes.
OptionalblockGroup code 293: enable block content scale.
OptionalbottomGroup code 272: bottom text attachment direction.
OptionalbreakGroup code 143: break gap size.
OptionalcontentGroup code 170: content type used by this MLeader style.
OptionaldefaultMTextGroup code 300: default MText contents.
OptionaldescriptionGroup code 3: MLeader style description.
OptionaldoglegGroup code 291: enable dogleg.
OptionaldoglegGroup code 43: dogleg length.
OptionaldrawGroup code 172: draw leader order type.
OptionaldrawMLeaderGroup code 171: draw MLeader order type.
OptionalfirstGroup code 40: first segment angle constraint.
OptionallandingGroup code 290: enable landing.
OptionallandingGroup code 42: landing gap.
OptionalleaderGroup code 91: leader line color (DXF raw int32).
OptionalleaderGroup code 173: leader line type.
OptionalleaderGroup code 340: leader line type ID (handle reference).
OptionalleaderGroup code 92: leader line weight.
OptionalmaxGroup code 90: max leader segment points.
OptionaloverwriteGroup code 295: overwrite property value flag.
OptionalscaleGroup code 142: scale.
OptionalsecondGroup code 41: second segment angle constraint.
OptionaltextGroup code 297: text align always left.
OptionaltextGroup code 176: text alignment type.
OptionaltextGroup code 175: text angle type.
OptionaltextGroup code 271: text attachment direction for MText content.
OptionaltextGroup code 93: text color (DXF raw int32).
OptionaltextGroup code 292: enable frame text.
OptionaltextGroup code 45: text height.
OptionaltextGroup code 174: text left attachment type.
OptionaltextGroup code 178: text right attachment type.
OptionaltextGroup code 342: MText style ID (handle reference).
OptionaltopGroup code 273: top text attachment direction.
Optionalunknown1Group code 179: undocumented value observed in AutoCAD-generated objects.
Optionalunknown2Group code 298: undocumented flag observed in AutoCAD-generated objects.
MLEADERSTYLE object fields mapped from AutoCAD DXF group codes.
Reference: