To add a certificate from within the Certificates component simply click on the "Add a Certificate" button found on the "Certificate Search" sub-tab page. This will open an editable version of the "Certificate" sub-tab page.
Enter the relevant information into any of the available fields and click the "Apply Changes" button to save your entry. You can refresh the page to reflect an un-applied changes by selecting the "Refresh" button or cancel any un-applied changes and return to the "Certificates Search" sub-tab page by selecting the "Cancel" button.