First, set up your team members - learn more about Team Management.
Assigning a page to a team member
To assign a page to a team member, click on the ... icon in the top right corner of the page.
Choose Assign to.
Checkmark the team member(s) responsible for the page, then click the blue arrow to move them to the Assigned column.
Save to complete the assignment.
Continue assigning pages to team members as long as you need.
Note that when a team member has a page opened in the Editor, the page will appear to be locked. Hover over the page to see who is working on it: