Whether you’re the owner of a shared document or have been invited to collaborate, after you open the document you can see the edits made by others in real time, hide or show editing activity, and more.
The number of people editing or viewing the document (not including you) appears next to the Collaborate button in the toolbar, and their names appear in the participant list.
When you receive a link to a shared document, what happens when you click the link depends on the access and permission set by the owner, the Pages and macOS versions installed on your computer, and whether you’re signed in to iCloud.
Click the link in the email, message, or post that you received.
If asked, sign in to iCloud with an Apple ID or follow any instructions that appear.
The document opens based on the following:
On a Mac: The document opens in Pages for Mac or in Pages for iCloud, depending on whether iCloud is set up on your Mac and you’re signed in; where you clicked the link (for example, in Mail on your Mac or on a webpage); and whether you have macOS High Sierra 10.13 or later and Pages 8.0 or later installed on your computer.
On iCloud.com on a Mac or Windows computer: If you’re signed in to iCloud.com in a web browser, the document opens in Pages for iCloud, and it’s added to your document manager and to iCloud Drive.
On an iOS device with iOS 11 or later and Pages 5.0 or later installed: The document opens in Pages on your iOS device and is added to your document manager.
On an Android device, or an iOS device without iOS 11 or later and Pages 5.0 or later installed: The document opens in a browser where you can view but not edit it.
If you’re having trouble accepting an invitation, make sure you meet the minimum system requirements for collaborating.
Open the shared document.
If you previously opened the document, look for it in the Pages folder of iCloud Drive. If you don’t see the document, click the link in the email, message, or post that you received, and if asked, sign in.
If you can’t open the document, see “Accept an invitation to collaborate,” above.
Edit the document.
Edits you and others make to the document appear in real time. Colored cursors and colored selections of text and objects indicate where others are currently editing. Move your pointer over a colored cursor to see who’s making the edit.
Do any of the following:
See who’s working in the document: Click 
in the toolbar to open the participant list, which shows who has joined the document and who is currently editing or viewing it.
The number of people editing or viewing the document (not including you) appears on the button.
Follow someone’s edits: Click the colored dot next to the person’s name in the participant list. If you don’t see a colored dot, the person has the document open but isn’t actively participating.
Hide or show activity (colored cursors or selections): Choose View > Hide Collaboration Activity or View > Show Collaboration Activity (from the View menu at the top of your screen).
Resolve conflicts: If you’re the document owner and there are conflicts, you see a dialog. Choose the version you want to keep; if you keep more than one, the most recent remains the shared version.
If you see an alert on the Collaborate button 
in the toolbar, your computer is offline and you can’t edit the document until it’s online again. Check your Internet connection and wait for your computer to reconnect.
If you no longer want to have access to a document that was shared with you, you can remove yourself from the participant list.
Click 
in the toolbar.
Move the pointer over your name, click the three dots that appear, then choose Remove Me.
Removing your name from the participant list removes the document from your iCloud Drive. If you later want to access the document again, you can use the original link to open it.
Note: Not all Pages features are available for a document that’s shared with others. See the Apple Support article About collaboration for Pages, Numbers, and Keynote for information.