All 3D elements have a User ID, known simply as the 'ID'. It can be observed and edited in the Info Box (near the top in our setup) and in the Settings dialog under the Listing And Labeling division. The only 2D element with an ID is the Fill. I wish other 2D elements had IDs. Then I could 'name'
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Every viewpoint has a name and an ID. The name is important and is often used for output. The ID is never used for output, but wherever possible we use the ID to help organize the project map and view map. For viewpoints with with a marker, the name and ID appear in the Info Box and settings dialog. This

