  Lying at the heart of quantum mechanics, coherence has recently been studied
as a key resource in quantum information theory. Quantum steering, a
fundamental notion originally considered by Schr{\"o}dinger, has also recently
received much attention. When Alice and Bob share a correlated quantum system,
Alice can perform a local measurement to `steer' Bob's reduced state. We
introduce the maximal steered coherence as a measure describing the extent to
which steering can remotely create coherence; more precisely, we find the
maximal coherence of Bob's steered state in the eigenbasis of his original
reduced state, where maximization is performed over all positive-operator
valued measurements for Alice. We prove that maximal steered coherence vanishes
for quantum-classical states whilst reaching a maximum for pure entangled
states with full Schmidt rank. Although invariant under local unitary
operations, maximal steered coherence may be increased when Bob performs a
channel. For a two-qubit state we find that Bob's channel can increase maximal
steered coherence if and only if it is neither unital nor semi-classical, which
coincides with the condition for increasing discord. Our results show that the
power of steering for coherence generation, though related to discord, is
distinct from existing measures of quantum correlation.
