If an ArcGIS Pro user copies layers from one map to another and the custom symbology carries over, what should they have done differently?

When an ArcGIS Pro user copies layers from one map to another and the custom symbology carries over, it indicates that the symbology information is being retained during the copy process. By selecting "Single Symbol" from the Symbology dropdown menu prior to this action, the user would restrict the representation of the layer to a singular style, simplifying the visual elements associated with it. This choice ensures that only the basic appearance is carried over, rather than any complex, customized symbology settings that might otherwise follow the layer into the new map.

The intent of this approach is to maintain consistency and manageability of the map's visuals, especially when transferring layers between different projects or maps that might not necessarily require or support the previous symbology styles. This can be particularly useful when standardization is desired across maps or when preparing data for sharing and collaboration in a project.

The other options, while relevant to different functionality and workflow considerations within ArcGIS Pro, do not specifically alter the behavior of how symbology is transferred when copying layers. They may address different aspects of data management or sharing but do not directly address the core issue of controlling the symbology that accompanies layer copying.