Hi, in ArcMap I created a custom coordinate system, an orthographic plane system with a specific center. Now I imported the project in ArcGIS Pro and I am not able to edit the coordinate system anymore or create a new one. Even with a new project/map I can not find the option to create custom coordinate systems. In Map Properties > Coordinate Systems I can import or select a specific system and I can see (but not edit) the details of my current system. Greetings, Martin
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