I'm using ArcGIS Desktop 10.8.1 and I need to make a map using a grid with an index. I did this years ago with an older version, using a script. But I don't have the script anymore. I have created an 8x8 grid and I want to create an index showing what grid location each road in a county shows up in. I want to put that index at the bottom of the map. I'm completely lost right now. Please help. Thanks!