diff --git a/R/flip.R b/R/flip.R
index ad1733f..310bfb3 100644
--- a/R/flip.R
+++ b/R/flip.R
@@ -1,7 +1,10 @@
-#' Flip a grob.
+#' Flip a picture
 #'
-#' @param g A grob
-#' @return Flipped grob
+#' `flip` returns a new picture made by flipping the input picture along
+#' its vertical centre axis.
+#'
+#' @param g A `grid::grob` picture
+#' @return A flipped `grid::grob` picture
 #' @export
 flip <- function(g) {
   grid::editGrob(g, x = grid::unit(1, "npc") - g$x)
diff --git a/man/flip.Rd b/man/flip.Rd
index a061fcb..4c83e8f 100644
--- a/man/flip.Rd
+++ b/man/flip.Rd
@@ -2,16 +2,17 @@
 % Please edit documentation in R/flip.R
 \name{flip}
 \alias{flip}
-\title{Flip a grob.}
+\title{Flip a picture}
 \usage{
 flip(g)
 }
 \arguments{
-\item{g}{A grob}
+\item{g}{A `grid::grob` picture}
 }
 \value{
-Flipped grob
+A flipped `grid::grob` picture
 }
 \description{
-Flip a grob.
+`flip` returns a new picture made by flipping the input picture along
+its vertical centre axis.
 }