Click on the brainbox icon and on "open" (only if you have already seen a brainbox) :
Select your brainbox and you can:
- change the order of the slides
- edit the element (name and description)
- delete a slide
Once you have made your modifications, you can export your brainbox presentation as a powerpoint file. You can do that here: How to export a brainbox for a presentation?.
The name and description will appear in your powerpoint.