I'm trying to set up an annotation labels for several feature classess in a map and would like them to display proportionally - relatively to map scale. I use ArcMap 10.1 and its Maplex label engine.
As an example, I am working on a regional map at a scale of 1:700K. My annotation on a FC (within GDB) is set to 12pt size. When I zoom in to a larger scale of 1:350K my annotations appear exactly the same size and are consequently too big!
I understand one can work with map document annotation or geodatabse annotation. I've seen some posts about setting a data frame reference scale to zero (eg http://forums.arcgis.com/threads/74004-Annotation-labels-at-different-scales), which should make mxd annotations display proportionally to map scale. However cannot seem to add custom reference scale of '0' to the customized list.