Hi Rodnebb,
with a double click in the block diagramm you can add a textbox where ever you want. Change the color of it and move it over your wire.
Mike
Yes free labels are the normal way to doc wires.
And for the sake of sharing LabVIEW trivia, you can also add documentation to your wires if you want. Note: This only shows up if you help window open and you are using the wiring tool.
Ben
I know this, but this text box doesn't attach to the wire. If there are many wires in a bundle (that's when you need a comment) it may be difficult to see which wire it belongs to.
It is also possible to add a comment to a wire, but you have to hover above it with the cursor to see it.
I wanted a comment like those you can attach to an object (say a sequence) to describe what happens inside it.
Is this what you are looking for:

It would be nice if wires had lables associated with them just as most structures have comments (case, loops....) This way there would be a name associated (for commenting only) with wires and lock to wires as they move.
Paul