Keynote
Keynote automatically saves your presentation as you work and gives it a default name. At any time, you can rename the presentation or create a copy of it with a different name.
Go to the Keynote app 
on your iPhone.
Open the presentation you want to rename.
Tap 
in the toolbar, tap Presentation Options, then tap Rename.
Enter a new name, then tap Done.
To quickly delete the current name, tap 
in the text field.
Go to the Keynote app on your iPhone.
If a presentation is already open, tap 
in the top-left corner to see all your presentations.
Touch and hold the presentation thumbnail, lift your finger, then tap Duplicate.
The duplicate appears with a number appended to its name.
If you don’t see the presentation you want to copy, try searching for it, or tap Browse, Shared, or Recents at the bottom of the screen. See Find a presentation.