Adjusts heading.

help-center/discover.mdx

@@ -15,9 +15,7 @@ You can also take a guided tour about Discover on the UI by clicking
 section.
 
 
-## Explore and search your data
-
-### Select or create a data view
+## Select or create a data view
 
 Select the data you want to explore. You need to create a data view from your
 Elasticsearch data to access it through Discover.
@@ -36,7 +34,7 @@ To view the count of documents for a given time in the specified range,
 select the corresponding part of the chart.
 
 
-### Explore fields
+## Explore fields
 
 Discover includes a table that shows all the documents that match your search.
 By default, the document table includes a column for the time field and a column
@@ -55,7 +53,7 @@ You can rearrange the table columns by clicking a column header and selecting
 clipboard, click the column header and select the desired **Copy** option.
 
 
-### Add runtime fields to your data view
+## Add runtime fields to your data view
 
 You can add a runtime field to your data view from inside of **Discover**, and
 then use that field for analysis and visualizations, the same way you do with
@@ -75,7 +73,7 @@ emit(doc['customer_last_name.keyword'].value + ", " + ch1);
 ```
 
 
-### Search and filter
+## Search and filter
 
 Discover combines the power of free text search with filtering capabilities
 based on structured data. To search all fields, enter a simple string in the
@@ -92,7 +90,7 @@ Click <DocIcon type="plusInCircleFilled" title="Add filter" /> next to the query
 bar to configure a filter.
 
 
-### Visualize field values
+## Visualize field values
 
 If the values of a field can be aggregated, you can visualize it from Discover.
 Find the field in the side bar and click its name to open a popup with