Copy and paste the contents of the .pub file, typically id_rsa.pub, into the SSH key content field on the left. code example
Example 1: copy ssh keys
pbcopy < ~/.ssh/id_rsa.pubExample 2: how to copy ssh key
ssh-copy-id -i ~/.ssh/mykey user@hostpbcopy < ~/.ssh/id_rsa.pubssh-copy-id -i ~/.ssh/mykey user@host