I will let other teams jump in if this is something they think would be useful. For my two cents, it would take a fair amount of work to add a new map element type, each new type takes quite a bit of coding. From someone who has worked on many, many HR missions, I'm not sure how useful any size "squares" would be. Search areas are rarely defined as such a uniform geometric shape, more often they are defined by roads, trails, geographic features, etc. I always found watching the area of the object being drawn in the lower left of the map screen useful when drawing a more free form area.