diff --git a/src/Axis.vala b/src/Axis.vala
index 5a1769e..2b3f68e 100644
--- a/src/Axis.vala
+++ b/src/Axis.vala
@@ -152,14 +152,23 @@ namespace CairoChart {
 		 */
 		public double font_spacing = 5;
 
+		/**
+		 * Number of equally placed points to evaluate records sizes.
+		 */
+		public int nrecords = 128;
+
 		/**
 		 * Constructs a new ``Axis``.
+		 * @param chart {@link Chart} instance.
 		 */
 		public Axis (Chart chart) {
 			this.chart = chart;
 			title = new Text (chart, "");
 		}
 
+		/**
+		 * Gets a copy of the ``Axis``.
+		 */
 		public virtual Axis copy () {
 			var axis = new Axis (chart);
 			axis._date_format = this._date_format;
@@ -180,8 +189,6 @@ namespace CairoChart {
 			return axis;
 		}
 
-		public int nrecords = 128;
-
 		public virtual void format_date_time (Float128 x, out string date, out string time) {
 			date = time = "";
 			var dt = new DateTime.from_unix_utc((int64)x);