Sorry for the delay but I've been very busy (I mean, veeeerrrrryy busy) with the 13.1 BETA version that we released this morning. It takes some time to pack everything for a full InDe release.
Anyway, I've looked at the thread and I think that the Goals and Objectives screen can be done with a book. You have some options (panels and books) for UI and choosing which one to use is something that strongly depends on what you have to do.
The Goals and Objectives can be done with a panel in a Form layout... you could define (at design-time) let's say 20 fields, hide some of them (the empty one?) and play with positioning... the book does the positioning automatically... and it has no limit on the number of item you can add (the 20 I was saying before).
So there is not a single answer... I could do it with both objects and obtain the exact same run-time form.
But I would choose a book because I can add as many Goal I want (and I don't have to fix at design-time the maximum number of goals) and I can add as many Objective as I want...
Also I don't have to play with positioning when I add a new Objective... I just need to reprint the book and the "new line" will show up and all other following objects will automatically move down.
In order to understand exactly pros and cons of both solutions I would suggest you to read the online manual where panels and books are presented:
http://doc.instantdeveloper.com/eng/inde-users-guide.pdfYou can find panels from page 114 and book from page 260.
Going back to the Clinical study example... I would do it with a book because the UI is not a grid nor a simple list of fields... but you could also use panel groups in order to group fields as shown... the right solution depends on what exactly you have to do.