Currently, the SEASONS link takes you to the Portfolio landing page. I would prefer it if when you click on it, a subnav of the individual portfolio pages were to show up (Spring, Summer, Fall, Winter), so visitors can go directly to the page, instead of having to go through an intermediate landing page. I believe I’ve seen it done on other Shapely sites. Any help would be greatly appreciated.
You’re looking in the right place, you’ve just set it up incorrectly.
‘Seasons’ should be a submenu, as in an item within your menu; not the menu itself.
Where it says ‘Select a menu to edit’ you need to select the main menu you’re using in your header, it may be called ‘Main Menu’ or ‘Home’.
Then you should add a link to your portfolio page i.e. ‘Seasons’ and add the seasons pages under that link. You can even just drag and drop them below to make them subitems.