I am trying to set up a model in ModelBuilder that will have a variable number of inputs. For example, I have some sites that in some cases I will want to search for its overlap with another shapefile. Another time I may want to search for its overlap with 2 or more shapefiles. I have it set up using 1 shapefile. However I am stuck as to how to go about setting up the option to input more than 1 shapefile. Using 'a list of values' doesnt seem to do the job as I want the outputs to be individual - i.e. how much does it overlap shapefile a and how much does it overlap shapefile b, not how much does it overlap shapefiles a and b.