analyze:

Analyze the selected text to find both the parameter to store and the text to emphesize (may be different from original selection). Does not return self!. May be of the form:
3+4
<3+4>
Click Here<3+4>
<3+4>Click Here

couldDeriveFromPrettyPrinting

Answer whether the receiver is a kind of attribute that could have been generated by doing polychrome pretty-printing of a method without functional text attributes.

dominatedByCmd0

Cmd-0 should turn off active text

emphasizeScanner:

Set the emphasis for text display

info

mayActOnClick

Subclasses may override to provide, eg, hot-spot actions

validate:

any format is OK with me