Highlight the text where you want the link to be, and the editor menu should appear. Then click the link icon (looks like a rotated oval with a straight line in the centre), and enter the link.
Alternatively, press CMD+K
Highlight the text where you want the link to be, and the editor menu should appear. Then click the link icon (looks like a rotated oval with a straight line in the centre), and enter the link.
Alternatively, press CMD+K