Colour atom by partial charge

I have been calculating an atomic properties (not partial charge) in another programme. The scores are stored in the partial charge field of a mol2 file, which reads in perfectly fine in DS (v2.0.1.7347). However, if I want to colour the atoms by partial charge the charge range is restricted from -1 to +1. Is there any way of changing this to arbitrary numbers (which would be handy for doubly charged metal ions as well)?

Thanks,