When inputting numbers into property fields, ORD can automatically calculate them for you. Example:

Survey field team shoots the top of casting elevation of a manhole at 500ft, then shoots again for a bottom invert of the manhole but only leaves a descriptor as -10ft.

Whenever correcting the elevation of these invert shots, I'd like to be able to just enter 500-10 into the Elevation of the point and have ORD automatically change the input to 490.