Hi Frank,
I am not sure whether you mean to add a label to the line. Please try the following example and see if this applied to you:
win -t plot;
draw -n myline -lm -v 2;
label -s \v($(myline.x,.3));
Text.Connect(myline,0,2);
If not, please post more details, such as the result you desired.
Regards,
Yuki
OriginLab Technical Service