Only the users with appropriate permissions can edit Scopes.
You can update the Scope from the:
Manage Scopes page
Create Template dialog
Edit Template dialog
Editing the Scope from the Manage Scopes page
To Edit the Scope from the Manage Scopes page:
Open the Manage Scopes page.
Find the Scope you wish to update and click on it.
Make the changes.
Click on the Update button.
Editing the Scope from the Create Template dialog
To Edit the Scope from the Create Template dialog:
Click the ‘Add Template’ button
Click on the ‘Scope’ field and select one from the list
Click the ‘Edit scope’ button
Make the changes.
Click on the Update button.
Editing the Scope from the Edit Template dialog
To Edit the Scope from the Edit Template dialog:
Select the Template for that you want to create a Scope
Click on the Template Name in the ‘Name’ column
Click on the ‘Scope’ field and select one from the list
Click the ‘Edit scope’ button
Make the changes.
Click on the Update button.
There are some peculiarities in the case of the Scope editing using the Team-Managed project types for scopes. Learn more about it here.