it was explained what smartmanagent is, but not how to actually change it

@@ -232,7 +232,7 @@ The Binding class is a class that will decouple dependency injection, while "bin
 This allows Get to know which screen is being displayed when a particular controller is used and to know where and how to dispose of it.
 In addition, the Binding class will allow you to have SmartManager configuration control. You can configure the dependencies to be arranged when removing a route from the stack, or when the widget that used it is laid out, or neither. You will have intelligent dependency management working for you, but even so, you can configure it as you wish.
 
-### How to use
+### Bindings class
 
 - Create a class and implements Binding
 
@@ -333,6 +333,23 @@ GetX by default disposes unused controllers from memory, even if a failure occur
 This is what is called the `full` mode of dependency management.
 But if you want to change the way GetX controls the disposal of classes, you have `SmartManagement` class that you can set different behaviors.
 
+#### How to change
+
+If you want to change this config (which you usually don't need) this is the way:
+
+```dart
+void main () {
+  runApp(
+    GetMaterialApp(
+      smartManagement: SmartManagement.onlyBuilders //here
+      home: Home(),
+    )
+  )
+}
+
+
+```
+
 #### SmartManagement.full
 
 It is the default one. Dispose classes that are not being used and were not set to be permanent. In the majority of the cases you will want to keep this config untouched. If you new to GetX then don't change this.