A Practice Note explaining how to prepare and submit the parties' briefs (the appellant's brief, appellee's brief, and appellant's reply brief) in a civil appeal to the US Court of Appeals for the Federal Circuit from an order or judgment of a federal district court, the US Court of International Trade, or the US Court of Federal Claims. This Note also explains how to brief cross-appeals and how to submit supplemental authorities (using so-called Rule 28(j) letters or FRAP 28(j) letters).