scribbling tool (eg for labeling markers)

[Stéfan van der Walt]

On Thu, Sep 4, 2014 at 10:01 PM, Emmanuelle Gouillart
<emmanuelle.gouillart at nsup.org> wrote:
> Answering my own question: I had forgotten that the viewer examples
> include such kind of example, inside watershed_demo.py. Thanks Tony
> for the example!

I think this is an important enough use-case to make it a utility
function--feel free to add an issue!

Stéfan