[OpenLayers-Users] measure layer

[marco]

Hi all,
using measure control, after I have drawn a line (or polygon) I get the relative value for length (or area), and then,  if I make a new measure drawing a new line, the previous one disappear.
I would like to have instead a "mesure layer" that allow to make multiple measures, drawing multiple lines each one with a progressive number as label.
What is the best way to get this result?
Is it possible to make this layer a real layer (turning it on/of)?

Thanks
Marco