Update multiple-axes.md

Author: LiamConnors

Diff for: doc/python/multiple-axes.md

@@ -352,5 +352,67 @@ fig.show()
 
 ```
 
+### Sync Axes Ticks
+
+*New in 5.13*
+
+
+When you have multiple axes overlayed, each axis by default has its own number of ticks. You can sync the number of ticks on an axis overlayed on another axis by setting `tickmode="sync"`. In this example, we sync the ticks on the `"Total bill amount"` axis with the `"Total number of diners"` axis that it overlays. 
+
+```python
+import pandas as pd
+import plotly.graph_objects as go
+from plotly.data import tips
+
+df = tips()
+
+summed_values = df.groupby(by="day", as_index=False).sum(numeric_only=True)
+day_order_mapping = {"Thur": 0, "Fri": 1, "Sat": 2, "Sun": 3}
+summed_values["order"] = summed_values["day"].apply(lambda day: day_order_mapping[day])
+summed_values = summed_values.sort_values(by="order")
+
+days_of_week = summed_values["day"].values
+total_bills = summed_values["total_bill"].values
+number_of_diners = summed_values["size"].values
+
+
+fig = go.Figure(
+    data=go.Bar(
+        x=days_of_week,
+        y=number_of_diners,
+        name="Total number of diners",
+        marker=dict(color="paleturquoise"),
+    )
+)
+
+fig.add_trace(
+    go.Scatter(
+        x=days_of_week,
+        y=total_bills,
+        yaxis="y2",
+        name="Total bill amount",
+        marker=dict(color="crimson"),
+    )
+)
+
+fig.update_layout(
+    legend=dict(orientation="h"),
+    xaxis=dict(showgrid=True, ticklen=10, tickwidth=3),
+    yaxis=dict(
+        title=dict(text="Total number of diners"),
+        side="left",
+        range=[0, 250],
+    ),
+    yaxis2=dict(
+        title=dict(text="Total bill amount"),
+        side="right",
+        range=[0, 2000],
+        overlaying="y",
+        tickmode="auto",
+    ),
+)
+
+```
+
 #### Reference
 All of the y-axis properties are found here: https://plotly.com/python/reference/YAxis/.  For more information on creating subplots see the [Subplots in Python](/python/subplots/) section.