  In search of novel, improved materials for magnetic data storage and
spintronic devices, compounds that allow a tailoring of magnetic domain shapes
and sizes are essential. Good candidates are materials with intrinsic
anisotropies or competing interactions, as they are prone to host various
domain phases that can be easily and precisely selected by external tuning
parameters such as temperature and magnetic field. Here, we utilize vector
magnetic fields to visualize directly the magnetic anisotropy in the uniaxial
ferromagnet CeRu$_2$Ga$_2$B. We demonstrate a feasible control both globally
and locally of domain shapes and sizes by the external field as well as a
smooth transition from single stripe to bubble domains, which opens the door to
future applications based on magnetic domain tailoring.
