I've just came to say i'd found #arrowPrototype. Thanks��Ben !

On Tue, May 26, 2015 at 2:14 PM, Ben Coman <btc@openinworld.com> wrote:
On Wed, May 27, 2015 at 1:04 AM, Laura Risani <laura.risani@gmail.com> wrote:
> Hi all,
> Is there a method that returns a diagonal arrow like the ambient's pointer?
>
> Best,
> Laura

I don't know what is "ambient's pointer" - but look on class side of
LineMorph and PolygonMorph.
cheers -ben