Because the arguments in this case have evolved somewhat over its history, it is important to note that supplemental briefs, while useful to the Court, may not be used to expand the issues beyond those identified in the original enumerations of error. Blockum v. Fieldale Farms Corp ., 271 Ga.App. 591, 592, 610 S.E.2d 82 (2005).Specifically, the Plaintiffs argued that in 1993, Gary and Randall executed a “unilateral” amendment to the RIF partnership agreement, which, as noted above, allowed non pro rata redemptions from partners' capital accounts, named Gary and Randall as managing partners, and gave them exclusive authority to manage the partnership and make distribution decisions.