In the main 3 sentences both equally 'click' and 'click on' are Okay, but why use the term 'on' when It is far from important? While in the 4th sentence 'click on right here' sounds strange. Preferable is: "Click below ..". (also click consonant) a speech seem made by sucking https://edwinivseo.bloguerosa.com/18791407/rumored-buzz-on-click