Quickly make a Grid Overlay in ArcGIS Pro
Video #80
In this video (under 3 mins!), I show you how to use an existing tool to quickly throw a grid on to the map window.
I create a 50km X 50km grid as polygons stored in a shapefile - which can then be used for any further processing.
Note that the description of the tool is:
"Creates a grid of rectangular polygon features that can be used as an index to specify pages for a map book using Data Driven Pages. A grid can be created that only includes polygon features that intersect another feature layer"
So its really for map book publication - hence the page numbers.