Recalibration marker

 

tv$>$ recalibration marker delete {all $|$ range {cursor $|$ value $|$ offset}
Delete recalibration region marker.

tv$>$ recalibration marker {enter {cursor $|$ value $|$ offset} $|$ list $|$ read filename$>$ $|$ restore $|$ store $|$ write filename$>$}
Handle recalibration region marker.