The Model workpanel
Within the Model panel we can find five subpanels: Variables, Initialization, Evolution, Fixed Relations and Custom.
Clicking on the subpanel’s interior creates a new page that asks for a page name. That creates a page with the name showing in the tab at the top of the panel.
Right clicking in the tab area opens a drop down menu offering options for creating and moving pages so that the variables can be grouped more clearly.
In the same way in that menu you can choose to enable/disable the page when you stop using this page in your model without having to remove it.