update field mapping

Author: mdbirnstiehl

solutions/observability/streams/management/schema.md

@@ -1,12 +1,46 @@
 ---
-navigation_title: Manage field mapping
+navigation_title: Map fields
 applies_to:
   serverless: ga
   stack: preview 9.1, ga 9.2
 ---
 
-# Manage field mapping using the Schema tab [streams-schema]
+# Map fields [streams-schema]
 
-## Permissions to edit and add fields [streams-schema-permissions]
+Mappings define how {{es}} stores and indexes your data, balancing storage efficiency against query capability and performance.
 
-## Field statuses [streams-schema-statuses]
+Unmapped fields can still be searched using [runtime fields](../../../../manage-data/data-store/mapping/runtime-fields.md), but these incur higher query costs. Runtime fields are useful for exploring your data and experimenting with different query types before finalizing a schema.
+
+Once you know which fields you query most often, you can map them to improve performance, at the cost of additional storage. For a general overview, refer to the [Mapping](../../../../manage-data/data-store/mapping.md) documentation.
+
+Streams gives you options for mapping fields and editing field mappings, either after creating a processor or from the **Schema** tab.
+
+## Processing tab
+
+After creating a [processor](./extract.md), open the **Detected fields** tab to find any fields that the processor has extracted. Streams automatically attempts to map these fields so you can use them in queries.
+
+From here, you can:
+
+- Accept the suggested field mapping.
+- Change the field mapping to a different type.
+- Remove the mapping from these fields.
+
+## Schema tab
+
+The **Schema** tab provides an overview of how fields are defined within your stream.
+
+**Classic streams:** the **Schema** tab lists all fields found in the underlying index or index template. Each field shows its mapping status and type. Fields are labelled with either a **Mapped** or **Unmapped** status accordingly.
+
+**Wired streams:** :applies_to: {"stack": "preview 9.2", "serverless": "preview"} the **Schema** tab determines field mappings by combining information from the current stream’s index and its parent streams. Fields whose type is defined in a parent stream have the status of **Inherited**. You can navigate to that parent stream to view or edit the mapping (except for fields defined in the root logs stream, which cannot be modified).
+
+When you add a mapping to a wired stream, its child streams inherit the mapping.
+
+### Edit mappings from the Schema tab
+
+To edit field mappings from the **Schema** tab:
+1. Open the **Field actions** menu by selecting the {icon}`boxes_vertical` icon.
+1. Select **Map field**
+1. From the **Type** dropdown, select the desired field type.
+1. Select **Stage changes**.
+
+% need to add permissions ## Permissions to edit and add fields [streams-schema-permissions]