Good to know, as i was not aware there was a yellow - upper_third or cyan - middle_centre zones available… just the magneta - lower_third for compliments.
top_bar and bottom_bar are light gray
top_left and bottom_left are red
top_center and bottom_center are blue
top_right and bottom_right are green
upper_third is yellow
middle_center is cyan
lower_third is magenta
All these regions will resize as needed.