What is the purpose of Gridline Properties?
To edit the active gridline in the map.
When is Gridline Properties active?
When a gridline is active in the map.
How do I access Gridline Properties?
On the Gridlines tab click Gridline Properties.
The GRIDLINES tab is available on the ribbon after selecting a gridline layer for a map in the Explorer window. To add gridlines to the map, on the MAP tab, in the Content group, click Add To Map, and select Gridlines to open the Add Gridline dialog box.