Normally you will just use the default settings for author signatures which is to show an author signature on posts but not on pages. The signature is positioned at the end of the content of the post.
However, if you are writing your posts in the style of a letter then you may want to have a PS or a PPS after the author signature.
In this case you can switch off the automatic insertion of signatures and instead use the Genesis Club Signature Shortcode, [genesis_club_signature] to insert the author signature within the post
That’s all folks!
Click for more about using the genesis_club_signature shortcode
Don’t forget to check out the other Genesis Club Shortcodes