[racket] Quarter-circle in upper right of Definitions window?

I'm not seeing this at all on Windows - how do I enable?

Kieron.

On Mon, Sep 17, 2012 at 1:44 PM, Robby Findler
<robby at eecs.northwestern.edu>wrote:

> It will appear when the online check syntax finds some documentation
> for the identifier at the insertion point. If you edit the identifier,
> it will disappear (but it may reappear if you move onto another
> identifier it knows about).
>
> Generally speaking, it should match the contents of the blue boxes in
> the documentation (eg a function contract or a macro's grammar spec).
>
> Robby
>
> On Mon, Sep 17, 2012 at 2:25 PM, Prabhakar Ragde <plragde at uwaterloo.ca>
> wrote:
> > Sorry if this is a dumb question. This small quarter-circle, with an
> arrow
> > in it, appears from time to time, and then disappears. It contains some
> > links to documentation. I cannot tell what is causing it to appear and
> what
> > causes it to disappear...? Thanks. --PR
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