another brilliant tutorial 😀 – however, not what I meant. But, sometimes it is good to walk away from the computer and go for a walk…. To get what I wanted, I have to
1) create a main category for all portfolio posts (POSTS/CATEGORIES, add new category (e.g. Portfolio) with no parent category)
2) mark images/posts that I want to show in the portfolio with category “Portfolio” (POST/ALL POSTS/EDIT POST).
3) create categories for the posts/images shown in the portfolio (POSTS/CATEGORIES, add new category with parent category (!!!!), e.g. Portfolio
Publish, done, smiling. The secondary menu shows up as shown here in the demo http://demo.onedesigns.com/pinboard/?page_id=26
M.