Dear teachers <br/><br/>A: You might have to click <b><i>in the upper left-hand corner</i></b> of the text-area to make your typing cursor appear.<br/><br/>Can I replace <b><i>in the upper left-hand corner</i></b> with <b><i>at the upper left -hand corner</i></b>? If not, why?<br/><br/>B: I remember there was this sign in his office that <b>said </b>PAINLESS DENTIST, UPSTAIRS.<br/><br/>Can I replace <b>said </b>with <b>read</b>? If not, why? I'm often confused as to when to use read or say when it comes to signs, titles, etc.<br/><br/>Thanks for your detailed explanation.