When editing a corridor I would like to be able to revise the station of a begin or end of a region by keying in an equation. Let's say I want to adjust a station by 15'. I would click in the station field in the parameters tab, put my cursor at the end of the current value and type +15 or -15. If my current value is 17512.32 and I wanted to add 15', it would look like this "17512.32+15" Also, when editing a region graphically, it would be nice to be able to do something similar. Select the region grip and type -15 to subtract 15' from the start station of a region.
