While associating the line with a specific field makes it much easier to find lines, here is the problem we run into.  We have multiple farms that lie next to one another and have no fence or fence line between them.  Sometimes they are farmed together, sometimes separate.  There are times it would be nice to have the ability to pull up and use the A-B line from the neighboring farm. 

I don't know what the perfect solution is.  You don't want to sort through hundreds of lines each time you pull into a field, but there are also times it would be nice to load any line that is on the display.