@AlfredBaldenweckproposed an easy way to update Annotation geometry using Arcpy, but knowing that the current Annotation implementation uses a CIM object stored in the Element Blob field of the annotation class, I don't see why that can't be expanded to give even more control over annotations using the existing workflows for CIM interaction using the arcpy.cim module.
Individual annotations in a class can be updated in the ArcPro UI using the Symbol button in the annotation attributes:
Since this is essentially just updating that stored CIM definition, why couldn't this be more transparently exposed to arcpy? The encoding of the data in that bytearray/memoryview object is opaque and seems to have leading and trailing bytes that differ based on annotation type, but it wouldn't be difficult for a developer that knows the spec to write a few classes (e.g. arcpy.Annotation) that handle that gracefully. There seems to be a stub type for Annotation in the arcobjects.geometries module:
So why hasn't this been implemented yet?
