Grid index map

[HoukieCVADD]

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!

[DanPatterson]

Are you trying to create a map series?

Map series—ArcGIS Pro | Documentation

[HoukieCVADD]

No. Not a series. Just one page, printed something like 36x44. Roughly 85% of the map will be a county with roads and a grid over it. At the bottom of the map, I want an index of all the roads and their location on the map that says something like "Main St D3" to show that Main Street is in that grid section. I've done this before, but it's been almost 10 years.