All CRTX chart templates you save within PowerPoint 2010 are saved to a default location. You really do not have to worry about the default location where PowerPoint saves and expects to find these CTRX chart templates if you are using these templates on just one computer. However if you need to share these CRTX chart templates with other users — or if you received a CRTX chart template from someone else — then you need to make sure that these CRTX files are placed in a distinct folder where PowerPoint expects to find them.

