Where can I apply or remove permissions?
Record permissions can be applied to contacts, communications, events, and deals. Basic Users are able to access only those records that they create or those they are granted access to. Account Administrators and Owners may grant or remove Basic Users' permissions at the bottom of a record's detail page; simply check the box next to your user's name to turn permissions on or off. Permissions may be batch added to several records at once on the main Contacts, Communications, and Deals tabs, as well as on the Search Results page.
Click here for more information on account user levels.