I have just upgraded to 12.5 from an earlier vrsion. I have been trying to edit the Standard double hung sash window with colonial round head, 2v +ih muntin with sunburst to represent a proper English Georgian window (in which the sunburst doesn't converge to a focus) without success. Nor does it seem possible to edit the upper and lower sashes individually to get one horizontal mintin upper and lower. So I want to edit the provided graphics to achieve an acceptable result and redefine a new symbol. Can someone please suggest a way to do this as neither Fundamentals nor Architect manuals were helpful.