[Gimp-user] How do I prevent the paint tool from drawing outside of the selection?

[wizzythegrape <forums gimpusers com>]

I have a picture I'm editing with gimp. I've made a selection of part of this
picture that I'm trying to paint. When I do this, it effects pixels outside of
the boundaries of my selection. This is the first time I've seen this. Does
anyone know how to prevent/solve this?

Thanks.

Attachments:
* http://www.gimpusers.com/system/attachments/147/original/example.png

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