If you want to reuse all this structure options, you can save them.

Use the menu "Structure Templates/Save...", and save the current options in the sub directory Data/Templates/Structures, under the name "user-1", for example. (You can of course save elsewhere, but this is a method to add new structure templates in the toolbar : see below).

Then, save the document, quit the application, and launch it again.

From now, this new structure options set (template) is displayed in the tab "Structure Templates" of the left side vertical toolbar.

Click on this tab to check that "user-1" template is available.