  In this note, we consider the linear topological invariant {\Omega}-tilda for
Fr\'echet spaces of global analytic functions on Stein manifolds. We show that
O(M), for a Stein manifold M, enjoys the property {\Omega}-tilda if and only if
every compact subset of M lies in a relatively compact sublevel set of a
bounded plurisubharmonic function defined on M. We also look at some immediate
implications of this characterization.
