reesIdeal(...,MinimalGenerators => X)Here X is of type boolean. Each of these functions involves the computation of a Rees algebra, which may involve a saturation step. This optional argument determines whether or not the output of the saturation step will be forced to have a minimal generating set. This is described in the documentation node for saturate.
The source of this document is in /build/macaulay2-88fgJW/macaulay2-1.25.11+ds/M2/Macaulay2/packages/ReesAlgebra.m2:2102:0.