Creating a custom MGRS Grid

[JenniferVanHouter]

Does anyone know how to create an MGRS index grid in 1:25,000? I created a graticule index grid and then tried to change the style but I only see  1:1,000,000, 1:100,000, 1:250,000, and 1:50,000 for the MGRS options. I am pretty new to index grids and MGRS so I am not sure if this can be customized and if so how?

Any help would be greatly appreciated.

[DanPatterson_Retired]

Did you see this link? The one associated with modifying an existing one doesn't show a scale change option

[BethanyHall]

Is there a way to do this in ArcGIS Pro?