In the presentation manager, you can group related presentations into folders so they’re easy to find.
With the presentation manager in browse view, swipe down, then tap 
.
Type a name, then tap Done.
To move a nearby presentation (in the same presentation manager view) into the folder, touch and hold the presentation, and when it appears to lift, drag it to the folder.
For more information, see Move a presentation.
If you use iCloud Drive and you create folders in the presentation manager, the folders also appear in iCloud Drive on your Mac and on iCloud.com.
If you’re viewing the presentation manager in list view, you need to switch to icon view before you can rename any items.
In the presentation manager, tap the folder name and delete it.
To quickly delete the current name, tap the “x” in the text field.
Type a new name, then tap Done.
You can use numbers and most symbols. You can’t include a colon (:) or start the name with a period (.). Some apps may not allow you to use a slash (/) in a filename.
With the presentation manager in browse view, tap Select in the top-right corner, tap a folder, then tap Delete at the bottom of the screen. The folder and its contents are deleted.