Im not sure about labview 6.1 but if you look in controls and decorations there are arrows and lines in there, at least in 7.1 there are.
Otherwise if you go to paint, or whatever drawing program, you can make any arrows or lines you want and simply select them and copy and paste the images on the front panel.
Look for a palette named 'Decorations'. It contains many lines and frames to help with panel layout. See attached image.
Ed
Ed Dickens - Certified LabVIEW Architect Lockheed Martin Space Using the Abort button to stop your VI is like using a tree to stop your car. It works, but there may be consequences.