How do I mark the middle of my rope?
There are various ways to mark the middle of the rope, but a good, safe way is to just use a water-based laundry marker. You can find them at most big box stores or grocery stores.
First, find the middle of the rope by running both ends through your hands until you're only left with a bight. This is the center. Then rotate the rope at this point and let the marker ink flow into it, covering all sides. Make your mark extend at least eight inches so that it will be easy to find as you set up for rappel.