Idea Delivered Partially

XPP 9.4 includes new underline styles including double, dashed, dotted, etc.

This is all we plan to do related to this Idea.

Ability to call custom macro at start and end of an underline

By marking the beginning and end of a section of text (perhaps covering several lines) and being able to define custom macro(s) to enable users to draw custom underlines.

Ideally, the x/y co-ordinates of start and end underlines should be accessible via frills processing. This would allow custom underlines / special effects to be drawn from the frill block.