When youre working with long blocks of Actionscripted code, do you want to manually scroll and scan trying to find a particular line of code that you need to work with?
Neither do I.
Sometimes people dont notice it, but Flash actually has a built-in Find function in the Actions pane, just like what you might find in Microsoft Word or Excel. See the little magnifying glass icon? Thats your lifesaver, right there. Click it to open the Find dialogue.