I need your attention
telling someone you need them to show you attention
My teacher says ojos aqui to get the class's attention and if I translated you title it would be " Necisito tu atención"
"Por favor, presten atención"
"Por favor, pongan atención"
Fíjense (en algo/to something) (3rd person plural), command. You would use this if you wanted to tell someone to pay attention to a specific thing, such as a section of a book. It would be helpful if you could give more context as to what you want someone/people to pay attention to and also if you are using it in a formal singular, informal singular or plural manner.