I am trying to use texture stencil, but sometimes the stencil stamp of texture that I want to paint doesn't appear, and I can not find it. Perhaps the position of stencil stamp is elsewhere. How can I reset the position to see it again?

[Blender file][1] (go to left upper window in blender: texture draw).


  [1]: https://drive.google.com/file/d/0B_-LXTRL7Tj2Y1NFMHQ2M2N5amc/edit?usp=sharing