Re: Efficiently using MOVE_IT_... to gather a plethora of information.

[martin rudalics]

> BTW, regarding that vertical-line feature: wouldn't it make sense to
> implement it not by sprinkling various little chunks of vertical bars in
> the glyph matrices (with the difficulty of making sure they are
> correctly connected, with the right color and what not), but by drawing
> it on top of the text?
>
> Having a "second layer" that can used to draw on top of the text would
> also be useful, e.g. to draw little arrows connecting various parts of
> the text.

We could try using "always on top" child frames.  Anything else would
probably clase with redisplay optimizations

martin