I tried to figure out how to move files and folders into the order that I wanted them in the Portfolio. I tried drag-and-drop, but I realized that they were being arranged alphabetically, because that is the default setting in File Details.
I went to the Specify File Details tab in the lower right, and added a new column, called Order. Then I assigned each file or folder a number. Now they line up the way I want.
2. Add a column (e.g. name it "sort" or "index");
3. Use list view to put your preferred sorting order number in the new column;
4. "Uncheck" the box for display if you don't want them to show up;
5. Lastly, select that new column name for "Initial Sort"