We continually update and expand our documentation and training materials, which offer extensive information on using the Genome Browser tools to explore UCSC-hosted data sets as well as custom sequence and annotation data hosted at user sites. We are broadening our onsite training program to include several additional geographical regions. To better support our Genome Browser mirror sites and source code users, we have rearchitected the software makefile system for our utilities and command-line tools to allow the compilation of specific tools independent of a full Browser installation. We have also adopted UDR (https://github.com/LabAdvComp/UDR), a new package that integrates rsync with the high-performance network protocol UDT, allowing quicker transfers of our large data sets to remote mirror sites.