By default, every Editor in your Workspace will automatically have editing permissions for any document you save to your Workspace.
You can change this for individual documents in the Sharing Settings tab of your document settings in Cloud. In the Manage Access section, use the drop-down menu next to your Workspace name to select the permissions you want for everyone else in your Workspace, including the option to allow comments.
If you change this setting to View or Inspect, nobody else in your Workspace will have permission to edit. You can then give specific individuals inside or outside your Workspace editing rights by inviting them via email and changing their permissions to Edit.
Alternatively, you can just remove edit permissions for specific people. Simply add their email addresses, and set their permissions to View or Inspect.
You can downgrade an Admin user’s permissions to View or Inspect if they don’t need or want to edit the document. However, Admins are the only people who can upgrade their own permissions from View or Inspect to Edit.
Note: If you are the author of a document and you downgrade your own permissions from Edit to Inspect or View using the Manage Access section, you will no longer be able to edit the document, or change your permissions. Your Workspace admin will need to upgrade your access to restore your editing permissions.