Introduction
Following the correct sequence of steps is essential if you want to set up a rear derailleur correctly. Otherwise, it can be a frustrating experience. The entire job can be time consuming, as you'll have to re-fit the gear cable and remove and replace the chain. However don't be put off, none of the steps are particularly difficult to accomplish.
This is a long guide, so you can choose to either watch the entire video above, or follow it in smaller chunks by clicking on the individual steps below.