  We show that quasi-one-dimensional (1D) quantum wires can be written onto the
surface of magnetic topological insulator (MTI) thin films by gate arrays. When
the MTI is in a quantum anomalous Hall (QAH) state, MTI$/$superconductor
quantum wires have especially broad stability regions for both topological and
non-topological states, facilitating creation and manipulation of Majorana
particles on the MTI surface.
