Custom callouts were originally slated to be feature in Halo: Reach, yet for an unkown reason were cancelled.
My suggestion is to bring these back. I’m not filing this specifically under Halo 4 because it was intended for reach, and is simple enough to be put in a TU.
My Idea for custom callout function is to allow forgers to name and highlight certain areas of interest. An easy way to do this would to implement a “Hill” zone, which could be modified like any other hill zone. The difference is that this hill would feature an advanced option to ‘Name’ the hill. A keyboard menu would appear, like saving a file, and a word typed in would be tagged to that hill, appearing as a callout. This Would allow forgers a feature that would improve maps and the relationship between players, forgers, and the maps they make.
Bungie made them! I mean, they made it for boneyard (core case, bravo control, alpha generator, vehicle depot) so why can’t we?