Implemented
Score710
Allow users to set transparency on text as well as their halos seperately. This would allow for finer adjustment of the text display and halo while still allowing some of the features below the text and/or halo to be seen if needed.
This functionality was implemented in ArcGIS Pro. Transparency can be applied to any element with color, and each one individually. So you can apply a transparency to the halo and choose to apply transparency or not, or at a different percent, to the text.
Color—ArcGIS Pro | ArcGIS Desktop