Using a digital camera an image of the customers house can be taken, downloaded to the salesmen's machine (usually a notebook) and imported into Photo Designer. 

The image is then sized either roughly, or exactly by identifying a window in the wall and its size.

The customers replacement windows can then be placed on the image to give an accurate picture of the finished installation.

Several images can be loaded together, showing different sides of the house, or the same side of the house with different windows or features e.g. with and without Georgian bar.