I have two feature-linked annotation features in a geodatabase. Both appear to be identical in every way, except that one creates annotations as single-part and the other creates them as multi-part. I know I could convert one to the other, but I'm looking for an option to create a new annotation feature as either single-part or multi-part. If there is no such option, how does ArcMap decide to which to create an annotation as?
In the label expression for my annotation feature, checking the 'Remove extra spaces from label' box in the 'Maplex' tab of the label expression makes the annotation be created as single-part. If the box is unchecked it is created as multiple-parts.