  We study four dimensional N=1 gauge theories that arise on the worldvolume of
D3-branes probing complex cones over del Pezzo surfaces. Global symmetries of
the gauge theories are made explicit by using a correspondence between
bifundamental fields in the quivers and divisors in the underlying geometry.
These global symmetries are hidden, being unbroken when all inverse gauge
couplings of the quiver theory vanish. In the broken phase, for finite gauge
couplings, only the Cartan subalgebra is manifest as a global symmetry.
Superpotentials for these models are constructed using global symmetry
invariants as their building blocks. Higgsings connecting theories for
different del Pezzos are immediately identified by performing the appropriate
higgsing of the global symmetry groups. The symmetric properties of the quivers
are also exploited to count the first few dibaryon operators in the gauge
theories, matching their enumeration in the AdS duals.
