Default Coordinate System when opening ArcMap

[rhunley3]

Hello Esri Community,

Wondering if there is a way to create a default coordinate system every time I use or open ArcMap.  Currently using ArcMap version 10.8.1. 

Thank You. 

[DanPatterson · Accepted solution]

In short, no.  The first layer added to a map set the coordinate system.  In Arcgis Pro, you can define a project template for new projects

[rhunley3]

Thank you.