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It has been a while since I was here last asking for help on map alterations. I have a new problem. I have collected many (over 100k) screeenshots of census data. In the interest of not using the actual captures (intelectual property restrictions), I have extracted the data alone to a new multi layered file with each address as its own layer. Some have 1 person, some have 200 people. Can I export each layer to file in such a way that the canvas will not be the 75 inch canvas in the parent image? I needed to use such a large transparent background because population density is very high. Is ther an autodetect feature?  Dave