Hi, I am running Feature Extraction-Example Based. I wish to classify 6 classes. I first segmented the image, then collected training samples. After collecting samples for the first class, I was able to save the samples. However, when I add another class to collect samples, the Save option is greyed out. It does not allow me to save anymore. I want to save the samples of all 6 classes in one shapefile so that I can edit them if needed. I would appreciate any advice. Thank you very much.