You can edit the sharing permissions (or level of access) a contact has for a property on the Sharing tab of your account:
- Locate the contact whose permissions you'd like to edit in the table.
- Use the "I want to..." dropdown menu in the Action column on the right to select "Edit Contact's Permissions."
- The Edit Sharing Permissions screen will open. Select the new level of permissions and then click "Edit Permissions" to save those changes.
If you need to set Custom permissions, an additional screen will open allowing you to make more granular selections. Once you've made your selections on that screen, click "Apply Selection." You'll then be taken out to the Edit Sharing Permissions screen, we're you'll need to select "Edit Permissions" to apply all your changes.
For how to edit a Data Exchange share, please see this FAQ: How Do I Edit a Data Exchange Share?