When designing a color pattern for a bead crochet rope, I sometimes unravel the entire project and start over. The cord will be very "squiggly" and that makes it difficult to crochet the rope again.
I could move the beads to the other end and cut off that part; but, why do that when you can easily straighten the cord with a simple method you can apply to any nylon cord.
Take a section of cord, about 5 inches, between each hand, and pull the cord apart for a few seconds. I suggest you wear kitchen gloves or some other gloves to protect your hands. The amount of cord between your hands is about 4 or five inches and the amount of tug you will exert depends on how much curl is in the cord. It is important to keep the tension on the cord for a few seconds or more. Move to the next section of cord, pull and hold. The cord is now straightened and, if necessary, you may repeat the process a second time.
(C-lon cord has introduced a new weight called Fine Weight bead cord Tex 135 and is especially good for Swarovki crystal bead and seed beads size 8.)
To shop for all kinds of threads and cords, shop at your local bead store or visit the website of Marion Hunsiker-Larsen, micro macrame artist.