Instructions for using all of the Genome Browser tools are provided via a context-sensitive ‘Help’ link at the top of every page and a ‘Training’ link on the homepage (http://genome.ucsc.edu/training.html). Free tutorials produced by OpenHelix are available from http://www.openhelix.com/ucsc/. Our FAQ (http://genome.ucsc.edu/FAQ/) provides answers to frequently asked questions, and new questions are answered through the searchable archives of our public mailing lists (http://genome.ucsc.edu/contacts.html) and directly from our staff (see ‘Contacting Us’ section). Other useful information contributed by the browser staff and users is available on the UCSC Genome Browser wiki site at http://genomewiki.ucsc.edu/.