Basic Customization > User Interface Customization > Adding Actions and Hooking Them Up in the UI > Tab Models > Objective > Solution > Procedure - Adding Tabs in the Navigator at Different Levels > Adding second level navigation links in navigator
  
Adding second level navigation links in navigator
This section details how to add custom second level navigation link in navigator.
Create a new sub model for your tab in custom-actionModels.xml
Your new first level tab will need a sub model to define second level navigation. In order for the navigation to find the sub model it must be named after the main tab that it belongs to. For sub models the parameters defaultActionType and defaultActionName are required. These parameters tell the system which action is the default when the user has never visited this tab before.
In our example we will need to create a new action model called “mytab navigation” like this:
<model name="mytab navigation" defaultActionType="mytab"
defaultActionName="list">
</model>
You can now add second level navigation links to your new action model following the instructions in Adding second level navigation links in navigator. You must create at least one second level navigation link whose name and type match the defaults specified in the action model tag.