diff --git a/docs/articles/configuration/Configuration.md b/docs/articles/configuration/Configuration.md
index 34a30549..4254a951 100644
--- a/docs/articles/configuration/Configuration.md
+++ b/docs/articles/configuration/Configuration.md
@@ -70,7 +70,8 @@ TypeAdapterConfig.GlobalSettings.ForDestinationType<IValidator>()
                                 .AfterMapping(dest => dest.Validate());
 ```
 
-NOTE: `ForDestinationType` above will always apply to all types assignable to `IValidator`. If destination class implements `IValidator`, it will also apply the `AfterMapping` config.
+>[!NOTE] 
+>`ForDestinationType` above will always apply to all types assignable to `IValidator`. If destination class implements `IValidator`, it will also apply the `AfterMapping` config.
 
 ## Open generics
 
@@ -80,3 +81,14 @@ If the mapping type is generic, you can create a setting by passing generic type
 TypeAdapterConfig.GlobalSettings.ForType(typeof(GenericPoco<>), typeof(GenericDto<>))
                                 .Map("value", "Value");
 ```
+>[!Note]
+> Starting with Mapster version 10.0.8, [validation](xref:Mapster.Configuration.ValidationAndCompilation#validating-mappings) for type pairs settings containing open generic type is disabled.
+>If you require validation of such settings, you must register the configuration for at least one pair of closed generic types:
+>```csharp
+>TypeAdapterConfig.GlobalSettings.RequireDestinationMemberSource = true; // check all destination member mapping
+>TypeAdapterConfig.GlobalSettings.ForType(typeof(GenericPoco<>), typeof(GenericDto<>))
+>                                .Map("value", "Value");
+>
+> TypeAdapterConfig<GenericPoco<int>, GenericDto<string>>.NewConfig();
+> TypeAdapterConfig.GlobalSettings.Compile(); // validate
+>```
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diff --git a/docs/articles/settings/Shallow-merge.md b/docs/articles/settings/Shallow-merge.md
index ba101264..05dce624 100644
--- a/docs/articles/settings/Shallow-merge.md
+++ b/docs/articles/settings/Shallow-merge.md
@@ -3,16 +3,62 @@ uid: Mapster.Settings.ShallowMerge
 title: "Settings - Shallow merge"
 ---
 
-## Deep copy vs. shallow copy
+## Deep copy vs. Shallow copy vs. Direct assignment
 
-By default, Mapster will recursively map nested objects (deep copy). You can do shallow copying by setting `ShallowCopyForSameType` to `true`.
+Depending on the settings specified, the mapping behavior may differ.
+```csharp
+var src = new Source { AProperty A {get; set;} , BProperty B {get; set;} } 
+var dest = src.Adapt<Destination>();
+```
+
+### Deep copy
 
 ```csharp
-TypeAdapterConfig<TSource, TDestination>
+// Deep copy - default behavior
+    var dest = new Destination { A = new AProperty{ int X = src.A.X }, B = new BProperty { int X = src.B.X} }
+```
+
+### Shallow copy
+
+>[!NOTE]
+> 1. Changes mapping behavior only for member(property,field) source and destination type in registered custom mapping configuration.
+> 2. Disable when destination member(property,field) using [`UseDestinationValue`](xref:Mapster.Settings.Custom.ReadonlyProperty) setting.
+> 3. Disable when registered custom mapping configuration `.NewConfig()` for Type member(property,field).
+
+```csharp
+//Shallow copy 
+TypeAdapterConfig<Source, Destination>
     .NewConfig()
     .ShallowCopyForSameType(true);
+
+    var dest = new Destination { A = src.A, B = src.B }
 ```
 
+### Direct assignment [v10.0.8+]
+
+>[!NOTE]
+> 1. Changes mapping behavior for Type.
+> 2. Disable when destination member(property,field) using [`UseDestinationValue`](xref:Mapster.Settings.Custom.ReadonlyProperty) setting.
+> 3. Disable when registered custom mapping configuration `.NewConfig()` contains the [`.MapWith()` and/or `MapToTargetWith()`](xref:Mapster.Settings.CustomConversionLogic) setting.
+
+```csharp
+// DirectAssignment
+TypeAdapterConfig<AProperty, AProperty>
+    .NewConfig()
+    .DirectAssignmentForSameType(true);
+
+    var dest = new Destination { A = src.A, B = new BProperty { int X = src.B.X} }
+
+    //for mapping AProperty to AProperty
+        var a = new AProperty();
+        var result =  a.Adapt<AProperty>(); 
+
+        // behavior equal
+        var result = a;
+```
+
+
+
 ## Copy vs. Merge
 
 By default, Mapster will map all properties, even source properties containing null values. You can copy only properties that have values (merge) by using `IgnoreNullValues` method.
diff --git a/docs/articles/settings/custom/Mapping-readonly-prop.md b/docs/articles/settings/custom/Mapping-readonly-prop.md
index c027b911..9a442ded 100644
--- a/docs/articles/settings/custom/Mapping-readonly-prop.md
+++ b/docs/articles/settings/custom/Mapping-readonly-prop.md
@@ -14,7 +14,7 @@ public class Order {
 }
 ```
 
-## Using `UseDestinationValue` attribute
+### Using `UseDestinationValue` attribute
 
 You can make your type pure readonly and annotate with `[UseDestinationValue]`.
 
@@ -27,7 +27,7 @@ public class Order {
 }
 ```
 
-## Convention based setup using `UseDestinationValue` Extension Method
+### Convention based setup using `UseDestinationValue` Extension Method
 
 Or you can apply without annotate each type, for example, if you would like all readonly `ICollection<>` to use destination value.
 
@@ -37,3 +37,11 @@ TypeAdapterConfig.GlobalSettings.Default
                                    member.Type.IsGenericType &&
                                    member.Type.GetGenericTypeDefinition() == typeof(ICollection<>));
 ```
+
+### Using `UseDestinationValue` [v10.0.4+]
+
+```csharp
+TypeAdapterConfig.GlobalSettings
+    .ForDestinationType<Order>()
+    .UseDestinationValue(dest=>dest.Items);
+```
\ No newline at end of file