diff --git a/R/lift-adat.R b/R/lift-adat.R
index d729b81..7a66628 100644
--- a/R/lift-adat.R
+++ b/R/lift-adat.R
@@ -65,7 +65,7 @@
 #'   coefficient, and estimated median and standard deviation estimates from
 #'   assay version groups \eqn{x} and \eqn{y} respectively.
 #'
-#' @section Extra Columns:
+#' @section Column Setdiff:
 #' * Newer versions of SomaScan typically have additional content, i.e.
 #'   new reagents added to the multi-plex assay that bind to additional proteins.
 #'   When lifting _to_ a previous SomaScan version, new reagents that do _not_
diff --git a/man/lift_adat.Rd b/man/lift_adat.Rd
index 7008369..5cd7928 100644
--- a/man/lift_adat.Rd
+++ b/man/lift_adat.Rd
@@ -96,7 +96,7 @@ coefficient, and estimated median and standard deviation estimates from
 assay version groups \eqn{x} and \eqn{y} respectively.
 }
 
-\section{Extra Columns}{
+\section{Column Setdiff}{
 
 \itemize{
 \item Newer versions of SomaScan typically have additional content, i.e.