Modifying existing buttons.

[Davi3234]

I modified an existing button, specifically the "Draw" button, I change a functionality, instead of drawing a line it is now creating a rectangle. I would know how I display to download this, because the viewer is alright, but when I will print the service is wrong.
My repository:
https://github.com/Davi3234/pdfJsRectangleDraw