If GeneralElements is set to true, idealSheafGens will replace all generators of I of the same degree with a new generator of the that degree which is a general linear combination of those generators, then run idealSheafGens on the new ideal.
The object GeneralElements is a symbol.
The source of this document is in /build/reproducible-path/macaulay2-1.25.06+ds/M2/Macaulay2/packages/VirtualResolutions/doc.m2:191:0.