Often when I probe I'd like to know how much the Z axis changed. Good way to tell just how flat a surface is. Can that info be added to the probe confirmation screen?
in the meantime you can do it yourself. in the Serial Console give $# which shows data like Code: [09:42:50] [ $# ] [G54:-60.000,-50.000,-20.000] [09:42:50] [ $# ] [G55:123.000,321.000,-3.140] [09:42:50] [ $# ] [G56:0.000,0.000,0.000] [09:42:50] [ $# ] [G57:0.000,0.000,0.000] [09:42:50] [ $# ] [G58:0.000,0.000,0.000] [09:42:50] [ $# ] [G59:0.000,0.000,0.000] [09:42:50] [ $# ] [G28:0.000,0.000,0.000] [09:42:50] [ $# ] [G30:-100.000,-97.000,3.000] [09:42:50] [ $# ] [G92:0.000,0.000,0.000] [09:42:50] [ $# ] [TLO:0.000] showing that my Z offset for G54 is -20. compare that to the offset after your probe and will know how much it changed.