diff --git a/src/Axis.vala b/src/Axis.vala
index feff290..c6db885 100644
--- a/src/Axis.vala
+++ b/src/Axis.vala
@@ -222,6 +222,9 @@ namespace CairoChart {
 			}
 		}
 
+		/**
+		 * Zooms out ``Axis``.
+		 */
 		public virtual void zoom_out () {
 			range.zoom_out();
 		}
diff --git a/src/Place.vala b/src/Place.vala
index 1f10a35..809a011 100644
--- a/src/Place.vala
+++ b/src/Place.vala
@@ -208,7 +208,7 @@ namespace CairoChart {
 		}
 
 		/**
-		 * Unzooms ``Place``.
+		 * Zooms out ``Place``.
 		 */
 		public virtual void zoom_out () {
 			zx0 = x0;
diff --git a/src/Range.vala b/src/Range.vala
index 9ee6946..15cf989 100644
--- a/src/Range.vala
+++ b/src/Range.vala
@@ -108,7 +108,7 @@ namespace CairoChart {
 		}
 
 		/**
-		 * Unzooms ``Range``.
+		 * Zooms out ``Range``.
 		 */
 		public virtual void zoom_out () {
 			zmin = min;