Select View > Hide Activity Pane.
Drag the right edge of the Activity sidebar to the left until it disappears.
Here are some things to keep in mind:
The activity list includes activities made in the document within at least the last 30 days, including your own. It highlights only the latest activities by others.
Newly added participants can see the entire collaboration history in the activity list (going back at least 30 days).
In a public document (a document with access set to “Anyone with the link” and permission set to “Can make changes”), participants marked “Guest” in the activity list and in notifications haven’t signed in to iCloud.
Any comments attributed to “Somebody” were made by participants who made their comments and then opted out of the document.
You can see what participants in a shared document are doing in real time. In the document, each participant appears as a cursor or highlight in a specific color, which matches the color next to their name in the participant list.
Do any of the following:
Follow someone’s edits: In the participant list, click on a participant’s name to jump to where they are working in the document.
Show or hide activity (cursors or selections in different colors): Click Activity Settings below the participant list, then select or deselect the checkbox next to “Show participant cursors.” You can also choose View > Show Participant Cursors or View > Hide Participant Cursors (from the View menu at the top of your screen).
A number next to toolbar, then click Activity Settings.
Turn notifications on or off to see when someone joins, edits, or comments.
You can also show or hide participant cursors and activity highlights.
Click Done.
If you aren’t getting notifications, you may need to allow notifications for the Pages app. Choose Apple menu > System Settings, then click Notifications in the sidebar. (You may need to scroll down.) Click Pages, then turn on Allow notifications.