  We are reviewing the power of Doppler tomography for detailed investigations
of polars (magnetic cataclysmic binaries without accretion disk). Using
high-resolution spectroscopy in combination with tomography as analytic tool,
the structure and extent of the accretion flows and accretion curtains in the
binaries can be uncovered and the irradiated and non-irradiated parts of the
mass-donating secondary stars can be made visible. In addition we show, how
basic system parameters like the binary inclination and the mass ratio can be
addressed by tomography.
