My assignment for my PM class is to created a network diagram using the information from an excel spread sheet. I am having issues with adding certain columns from excel to MP. The excel sheet has columns that MP does not recognize when I try to add a new column. For example, the excel spread sheet has duration (which is found in MP) and minimum duration (which is not). How do I go about adding new columns that MP doesn’t recognize or is that not a feature the software offers.