You can add and remove the columns shown on screen in the People area of Organise using Column Settings. You can display up to ten columns on screen. If you are adding columns to include in an export you can select more but they won't display on screen.
Open Column Settings by clicking on the cog icon to the right of the column names:
Toggle the switches to add and remove columns. Grey means the column is not included and dark blue means it is included. Click Confirm once you have added and remove your columns - you may need to scroll down to see the Confirm button. 