Here are the most frequent tasks that are done in the Contact Manager, with the shortcuts so that you can use these tasks without having to use your mouse:
You can edit a contact two ways:
Click once on the person's address card and you can edit the person's properties all in the same window.
Double-click on the contact's card and alter their details.
Right click on a contact and click Delete or select a contact and press the Delete on the toolbar.
Right click on a contact and select Send message to contact.