Auras and Static Measuring tools

What Feature would you like to see included within TaleSpire?
An togglable ability to add auras to tokens or objects to display a region around them while they move.

What situations would this Feature be useful?
In situations where spells/abilities are centered on a object/token, and players should be able to see if other objects/tokens are within the region while the object/token moves, instead of having to redefine the region with the cylinder measuring tool on each movement. 

Additional Thoughts/Details
These auras could be colored to allow for different kinds of representation of spells/abilities. They could also be stacked, to show multiple effects at once.

Additionally, this could extend onto the measuring tool, and allow for some measurements to remain static, and not disappear. So that if an area has an effect being done to it for a duration, the measurement can stay there, instead of being removed when the measuring tool is to be used for something else.