This button enables you to access the layout dialog box.
You can also click on the corresponding button on the toolbar to achieve the same result.

If you right-click on an empty space on the page (the space not covered by labels) you will be presented with a short context menu:

  • Layout settings: opens the layout dialog box.
  • Add group: adds a new group to the current job.
  • Add page element: adds a new page element.