1. In the spreadsheet: use separate worksheets for node and edge lists. This will ease working with spreadsheets using for example filters on column data. The worksheet names would be for example "Nodes" and "Edges"
2. Automatically recognize the headings "Source IDs" and "Target IDs" columns in the Edge list, when headers are used
3. Automatically recognize "Node IDs" and "Group Node IDs" columns in the Node list when headers are used