green and blue track in protel

[aashish]

Hi<p>I am working on protel and new to it. When I was doing the autorouting in the PCB layout i found two types of tracks in the lay out. one is blue which never intersect each other, but the other green is does intersect at some place.<p>Please clarify what are these blue and green track.<p>Thanks
Ashish

[upsmaster]

Like AutoCad or Orcad different elements in a drawing are on different layers and are different colors. for P.C. layout they could be traces on the top side and a different color for the back side, or power supply lines positive and negitive ect,ect.
Where they intersect could be a via where the connection passes from one side of the board to the other.
joe