Re: Highlighting rectangles?

[Richard Stallman]

    I'm thinking about a more complete solution: changing call-interactively
    to recognize my marks and use them if they are set before falling back
    to use the mark and point (may be even use the temp buffer trick for
    block marked area [rectangle]).

monnier+gnu/address@hidden recently proposed implementing a
system for a region containing disjoint intervals.  I think it would
be good for you and him to discuss what to do here.