Visio 2010 Shapes window is gone from the left panel. How to get it back

1. Right click the stencil heading of the stencil that contains the shape you want (e.g. Blocks).
2. Click Edit Stencil.
3. Right click the shape.
4. Click Edit Master > Edit Master Shape.
5. Click File > Save As and pick SVG or whatever.

This tool may help you: http://viziblr.com/news/2012/3/10/browsing-visio-2010-stencil-shapes-as-a-document.html

It will create an HTML document that shows all the shapes in one or more stencils. So now you can browse the shapes without having to open up all the stencils one by one.