Question: Im designing a long form on tablet. The form is made up of 5 case studies and 8 questions per case study so 40 questions.

The form is linear but users can choose to jump between sections (i.e. you dont have to fill in each question to get to the next)

My plan is to use LHN for case studies but to display each of the 8 questions on the page. My question is should i display questions all open (they can just scroll to see it) or do i show a collapse view as per image so users get an understanding of the form. 

The form is an interview form and users (interviews) will be reusing the same form for each interview[![enter image description here](https://i.stack.imgur.com/l0Hgv.png)](https://i.stack.imgur.com/l0Hgv.png)

Answer: 
> 
> as we wouldn't be able to see the other items
> 
> 
> 

This wouldn't be a good UX.

Give your users the big picture view. Use symbolic representation of the items: item titles, item pictures.
When the current item is too tall, maybe allowing the users to see a portion of "other content" will help them to understand that there is some space where they can drag&drop the current item.

Also, perhaps, allowing the screen to auto-scroll when the users are dragging the item nearby the screen edges will be a good interaction?

Have a look at the mobile view of `todoist` or similar list-heavy apps, maybe they have sorted this issue in a smart way that may inspire you or put you in the right direction :)