diff --git a/dev/docs/source/working_with_charts.rst b/dev/docs/source/working_with_charts.rst
index 334095c2..a43329e7 100644
--- a/dev/docs/source/working_with_charts.rst
+++ b/dev/docs/source/working_with_charts.rst
@@ -1501,8 +1501,8 @@ See :ref:`ex_chart_date_axis`.
 Chart Secondary Axes
 --------------------
 
-It is possible to add a secondary axis of the same type to a chart by setting
-the ``y2_axis`` or ``x2_axis`` property of the series::
+    It is possible to add a secondary axis of the same type to a chart by setting
+    the ``y2_axis`` or ``x2_axis`` property of the series::
 
     import xlsxwriter
 
@@ -1638,7 +1638,7 @@ There are some limitations on combined charts:
 * Pie charts cannot currently be combined.
 * Scatter charts cannot currently be used as a primary chart but they can be
   used as a secondary chart.
-* Bar charts can only combined secondary charts on a secondary axis. This is
+* Bar charts can only combine secondary charts on a secondary axis. This is
   an Excel limitation.
 
 
diff --git a/examples/chart_combined.py b/examples/chart_combined.py
index a403fb13..d05cad9b 100644
--- a/examples/chart_combined.py
+++ b/examples/chart_combined.py
@@ -43,7 +43,7 @@
     }
 )
 
-# Create a new column chart. This will use this as the secondary chart.
+# Create a new line chart. This will use this as the secondary chart.
 line_chart1 = workbook.add_chart({"type": "line"})
 
 # Configure the data series for the secondary chart.
diff --git a/xlsxwriter/chart.py b/xlsxwriter/chart.py
index 77310866..a8a2f1f9 100644
--- a/xlsxwriter/chart.py
+++ b/xlsxwriter/chart.py
@@ -70,7 +70,7 @@ def __init__(self, options=None):
         self.show_blanks = "gap"
         self.show_na_as_empty = False
         self.show_hidden = False
-        self.show_crosses = 1
+        self.show_crosses = True
         self.width = 480
         self.height = 288
         self.x_scale = 1
@@ -722,10 +722,7 @@ def _convert_axis_args(self, axis, user_options):
             "text_axis": False,
         }
 
-        if "visible" in options:
-            axis["visible"] = options.get("visible")
-        else:
-            axis["visible"] = 1
+        axis["visible"] = options.get("visible", True)
 
         # Convert the display units.
         axis["display_units"] = self._get_display_units(axis["display_units"])
diff --git a/xlsxwriter/chart_area.py b/xlsxwriter/chart_area.py
index c764bd01..61d05dcf 100644
--- a/xlsxwriter/chart_area.py
+++ b/xlsxwriter/chart_area.py
@@ -38,7 +38,7 @@ def __init__(self, options=None):
             self.subtype = "standard"
 
         self.cross_between = "midCat"
-        self.show_crosses = 0
+        self.show_crosses = False
 
         # Override and reset the default axis values.
         if self.subtype == "percent_stacked":
diff --git a/xlsxwriter/chart_bar.py b/xlsxwriter/chart_bar.py
index 07820462..4c689f2c 100644
--- a/xlsxwriter/chart_bar.py
+++ b/xlsxwriter/chart_bar.py
@@ -42,7 +42,7 @@ def __init__(self, options=None):
         self.val_axis_position = "b"
         self.horiz_val_axis = 0
         self.horiz_cat_axis = 1
-        self.show_crosses = 0
+        self.show_crosses = False
 
         # Override and reset the default axis values.
         self.x_axis["defaults"]["major_gridlines"] = {"visible": 1}
diff --git a/xlsxwriter/chart_stock.py b/xlsxwriter/chart_stock.py
index 2e68cb0a..0cc23e06 100644
--- a/xlsxwriter/chart_stock.py
+++ b/xlsxwriter/chart_stock.py
@@ -28,7 +28,7 @@ def __init__(self, options=None):
         """
         super(ChartStock, self).__init__()
 
-        self.show_crosses = 0
+        self.show_crosses = False
         self.hi_low_lines = {}
         self.date_category = True