So here is a Web Intelligence report on the iPad, and thanks to several ASUG webcasts, I am getting to understand more about BI Mobile
First, I double-tap on the header of a table and then the table actions menu appears:
I can sort or hide a column. I hide a column.
So now I can unhide the column as well.
I can select a column and move it, as shown above.
Still exploring the options but wanted to share what I have learned.