Update body_create description in PhysicsServer2D/3D

doc/classes/PhysicsServer2D.xml

@@ -369,7 +369,8 @@
 		<method name="body_create">
 			<return type="RID" />
 			<description>
-				Creates a 2D body object in the physics server, and returns the [RID] that identifies it. Use [method body_add_shape] to add shapes to it, use [method body_set_state] to set its transform, and use [method body_set_space] to add the body to a space.
+				Creates a 2D body object in the physics server, and returns the [RID] that identifies it. The default settings for the created area include a collision layer and mask set to [code]1[/code], and body mode set to [constant BODY_MODE_RIGID].
+				Use [method body_add_shape] to add shapes to it, use [method body_set_state] to set its transform, and use [method body_set_space] to add the body to a space.
 			</description>
 		</method>
 		<method name="body_get_canvas_instance_id" qualifiers="const">

doc/classes/PhysicsServer3D.xml

@@ -351,6 +351,8 @@
 		<method name="body_create">
 			<return type="RID" />
 			<description>
+				Creates a 3D body object in the physics server, and returns the [RID] that identifies it. The default settings for the created area include a collision layer and mask set to [code]1[/code], and body mode set to [constant BODY_MODE_RIGID].
+				Use [method body_add_shape] to add shapes to it, use [method body_set_state] to set its transform, and use [method body_set_space] to add the body to a space.
 			</description>
 		</method>
 		<method name="body_get_collision_layer" qualifiers="const">