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Contacts App search bar
When you are within the Contacts App a Search Contacts search bar (orange arrow) is visible above the table. Use this to type in the name of the contact you want to find. You do not need to press Enter to initiate the search; simply type and wait for the results to appear.
Filter Contacts button in the Contacts App
When you are within the Contacts App the Contact Filters button is visible (pink arrow). This allows you to use various filters to limit the number of contacts that are displayed in the table. Note that the Filters remember your previous settings so consider pressing Reset whenever you arrive on the Manage Contacts page.
Column Sorting in the Overview tab of the Contacts App
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You can use the page numbers (see the green arrow) to jump between the different pages of your contacts while you are in the Contacts App. Click the name of a contact to go to their Contact Profile Page.