Since there isn't an option to create ground based zones with default functionality (the workaround I've figured out is creating a transparent token, throwing it on the ground, and giving it an aura of the appropriate size), I'd like to proffer 2 suggestions that would solve the problem by adding an extra option or two on the toolbar. The first is to create an option that lets you explicitly create an "empty" token that can be modified by the creator (and the GM) to be given an aura. Essentially, the tool would create free floating auras. The second is the option to mark specific hexes/squares with the color overlay reminiscent of the auras (the polygon/fill option can do this, but it isn't colored and transparent and requires creating the polygon every time), which would allow users to create temporary effect zones and walls without having to move to convoluted means.
