Window marker

 

tv$>$ window marker horizontal {delete $|$ enter {cursor $|$ value} $|$ list $|$ read filename$>$ $|$ restore $|$ store $|$ write filename$>$}
Handles horizontal markers in active window.

tv$>$ window marker vertical {delete $|$ enter {cursor $|$ value} $|$ list $|$ read filename$>$ $|$ restore $|$ store $|$ write filename$>$}
Handles vertical markers in active window.