[racket-dev] Feature request:highlight variables

I just downloaded the latest version of Komodo Edit (I needed to edit some
PHP code) and it has an interesting feature that might be useful in
DrRacket.  In DrRacket if you hover the mouse pointer over a variable you
get arrows from the binding occurance of a variable to its bound occurances
which is very useful but if you move the cursor off the variable then the
arrows disappear.  In the latest version of Komodo if you click on a
variable then all occurances of that variable are highlighted.

It might be a useful enhancement in DrRacket, that if you clicked on the
binding occurance of a variable then it and all its bound occurances would
be hightlighted until you again clicked them off or clicked on a the
binding occurance of a new variable. Or alternatively and probably better
if clicking made the arrows stay until you clicked  them off.

Harry Spier
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