VoluBA ("Volumetric Brain Anchoring") is an online service which allows to upload a high-resolution volume of interest (VOI) to perform interactive anchoring to the BigBrain, without the need of downloading the BigBrain volume to a local machine. VoluBA provides fast and intuitive manipulation of the 3D position, orientation, and scale of the VOI. Furthermore, it allows to precisely enter pairs of corresponding 3D landmarks and use them to refine the alignment by 3D affine parameters. In addition, a plugin is available for subsequent nonlinear adjustment of cortical VOIs, which exploits equivolumetric volumetric depth as a constraint in case that a segmentation of the gray matter is available. This tutorial provides a hands-on introduction to VoluBA, using a real world example dataset.