Key Features

Key features are the objective preference features key to the baseline legibility of a white spaced sheet. The key features are non-configurable.

A-A Overlap

Defines overlaps between the main geometry of an annotation and the main geometry or connection line of another annotation. A-A overlap is a non-configurable key feature.

CONL-CONL Intersection

Defines intersections between connection lines.

There are two types of CONL-CONL intersections:

• Non-configurable key feature: two label leader lines intersect with each other, if both labels have the Anno intersection allowed option set to False.

• Not a key feature: any other combination of two connection lines that intersect with each other, for example:

  • Two label leader lines, at least one of them has the Anno intersection allowed option set to CONL only or True.

  • A label leader line with any other connection line (for example, a dimension projection line).

  • Two dimension projection lines.

  • Any two primitives represented as connection lines.

When a CONL-CONL intersection occurs that is not a key feature, although preferable to the key feature CONL-CONL, it is still lightly penalized to indicate that no intersection is the preferable scenario.

As a result of this, accepting a dimension projection line to dimension projection line intersection may lead to an improved layout which avoids, for example, an A-RS overlap.