From f202d5ab8b635698c972c0730ee86f7311b36463 Mon Sep 17 00:00:00 2001
From: Luke Campagnola <luke.campagnola@gmail.com>
Date: Mon, 28 Apr 2014 08:19:53 -0400
Subject: [PATCH] Update AxisItem.setGrid docstring

---
 pyqtgraph/graphicsItems/AxisItem.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pyqtgraph/graphicsItems/AxisItem.py b/pyqtgraph/graphicsItems/AxisItem.py
index 95093251..af393fdc 100644
--- a/pyqtgraph/graphicsItems/AxisItem.py
+++ b/pyqtgraph/graphicsItems/AxisItem.py
@@ -161,7 +161,11 @@ class AxisItem(GraphicsWidget):
         self.scene().removeItem(self)
         
     def setGrid(self, grid):
-        """Set the alpha value for the grid, or False to disable."""
+        """Set the alpha value (0-255) for the grid, or False to disable.
+        
+        When grid lines are enabled, the axis tick lines are extended to cover
+        the extent of the linked ViewBox, if any.
+        """
         self.grid = grid
         self.picture = None
         self.prepareGeometryChange()