diff --git a/SketchWidget.py b/SketchWidget.py
index dd2ce7b..3f1f41a 100644
--- a/SketchWidget.py
+++ b/SketchWidget.py
@@ -16,8 +16,9 @@ class SketchWidget:
         self.size = (1, 1)
 
         # Configuration parameters
-        self.line_size = 0.8
-        self.axis_size = 1.8
+        self.line_width = 0.8
+        self.axis_width = 1.8
+        self.axis_length = 50
 
         try:
             # try double-buffered
@@ -86,9 +87,9 @@ class SketchWidget:
 
         for shape in self.sketch:
             if isinstance(shape, Line):
-                self.drawLine(shape, self.line_size)
+                self.drawLine(shape, self.line_width)
             elif isinstance(shape, Circle):
-                self.drawCircle(shape, self.line_size)
+                self.drawCircle(shape, self.line_width)
 
         if gldrawable.is_double_buffered():
             gldrawable.swap_buffers()
@@ -171,6 +172,8 @@ class SketchWidget:
         glPushAttrib(GL_CURRENT_BIT)
         glColor(1.0, 0.4, 0.4, 1.0)
         cx, cy = self.ptToScreenPt((0, 0))
-        self.drawFilledLine(cx - 25, cy, cx + 25, cy, self.axis_size)
-        self.drawFilledLine(cx, cy - 25, cx, cy + 25, self.axis_size)
+        self.drawFilledLine(cx - self.axis_length, cy,
+                cx + self.axis_length, cy, self.axis_width)
+        self.drawFilledLine(cx, cy - self.axis_length,
+                cx, cy + self.axis_length, self.axis_width)
         glPopAttrib()