Intro to collaboration in Keynote for iCloud
You can collaborate with others in real time by sharing a link to your Keynote for iCloud presentation. Shared presentations and any changes to them are saved in iCloud, and people working in the presentation see the changes as they’re made.
As the owner of the presentation, you control who has access to it, and what they can do:
Presentation access: You can send a link that anyone can use to open the presentation. Or, you can invite specific people who must sign in to iCloud with their Apple ID to open the presentation.
Editing permission: You can choose whether others can make changes to the presentation or only view it.
If you set access to allow anyone with the link to open your presentation, they don’t need an iCloud account or Apple ID to view or edit the shared presentation.
If you invite only specific people to collaborate on your presentation, they must be signed in to iCloud to view or edit the presentation. If you invite someone using an email address or phone number that isn’t associated with their Apple ID, they won’t be able to accept the invitation until they add the email address or phone number to their Apple ID. See Accept an invitation to collaborate.
Minimum system requirements
To view or edit a shared presentation, people you share with need any of the following:
A Mac or Windows computer with a supported browser.
A Mac with macOS High Sierra 10.14 or later and Keynote 9.2 or later. They must also be signed in to iCloud and have iCloud Drive turned on.
An iOS device with iOS 12 or later or iPadOS and Keynote 5.2 or later. They must also be signed in to iCloud and have iCloud Drive turned on.
Anyone using an Android device, or an iOS device without iOS 12 or later or iPadOS and Keynote 5.2 or later, can view, but not edit, the presentation.
Note: If your presentation is stored in Box instead of iCloud, you can still collaborate using the collaboration controls in Box. See the Apple Support article on using iWork with Box.