By default, media is displayed on your professional profile based on the order in which you have added it, with the newest media shown first.

If you wish to change the default order, you can assign a numerical display order to each media item. Media will then be displayed in order from highest to lowest (i.e. your oldest media item should be assigned "1" to appear at the bottom of the list). This ensures you don't need to assign a new order each time you add new media.