The Page Designer in NAV 2017 has a Page Preview tool that is very helpful in defining our control placement and action menu layout. The button to invoke a Page Preview is shown in the following screenshot:

If we click on the Preview button while we have a page open in the Page Designer, a preview of that page's layout will display. The controls and actions are not active in the preview (this is display only), but we can display all the ribbon tabs and their controls.

The Preview screen is interactively linked to the Page Designer and its subordinate Action Designer. When we click on a control line in the Page Designer, or an Action line in the Action Designer, Page Preview highlights the generated object, or when we click on a control or action displayed in the previewed page, the corresponding line in Page Designer or Action Designer is highlighted. An example of a highlighted control is shown in the following partial page screenshot:

In the following screenshot, an action is highlighted in the Page Preview: