When you Create or Edit an Activity you can view information from the Linked Records (Leads, Companies, Contacts, Projects, Sales Orders etc....)
To do this you would select one of the icons that are displayed to the right of the Linked Record Field.
A description of the icons is shown below
|Search - this Icon opens the relevant Search Window to allow you to make a link
|Delete/ Clear - this Icon deletes whatever is currently linked in this field
|Edit - this Icon opens a separate window with the linked record in EDIT mode, allowing you to make changes and save without leaving the ACTIVITY
|View - this Icon opens a separate window displaying the linked record in VIEW mode (non edit)
|Call - this Icon appears when you have on screen dialling configured and when clicked will dial the primary telephone number of the linked record
|Authorised Contacts - this Icon is displayed when this Contact has been set as authorised*. When you click on it, it will display all Authorised Contacts linked to that Company.
|Unauthorised Contacts - this Icon is displayed when this Contact has NOT been set as authorised*. When you click on it, it will display all Authorised Contacts linked to that Company.
* You will need to enable this by going to Additional Settings and searching for "Use Authorised Contacts". This FAQ has more information.