diff --git a/R/estimate_contrasts.R b/R/estimate_contrasts.R
index e91b7630..53627819 100644
--- a/R/estimate_contrasts.R
+++ b/R/estimate_contrasts.R
@@ -52,7 +52,7 @@
 #' # By default: selects first factor
 #' estimate_contrasts(model)
 #'
-#' # Can also run contrasts between points of numeric
+#' # Can also run contrasts between points of numeric, stratified by "Species"
 #' estimate_contrasts(model, contrast = "Petal.Width", by = "Species", length = 4)
 #'
 #' # Or both
diff --git a/man/estimate_contrasts.Rd b/man/estimate_contrasts.Rd
index b847877e..10740f16 100644
--- a/man/estimate_contrasts.Rd
+++ b/man/estimate_contrasts.Rd
@@ -243,7 +243,7 @@ model <- lm(Sepal.Width ~ Species * Petal.Width, data = iris)
 # By default: selects first factor
 estimate_contrasts(model)
 
-# Can also run contrasts between points of numeric
+# Can also run contrasts between points of numeric, stratified by "Species"
 estimate_contrasts(model, contrast = "Petal.Width", by = "Species", length = 4)
 
 # Or both