"Who Says This?" Make sure the reader knows who's talking.

One of the most frequent things I find myself writing on students' manuscripts is "Who says this?" I did a big post on writing dialogue a couple of years ago, so this is a round-up of solutions to this specific problem of making sure the reader knows which character says what.
Read more: https://emmadarwin.typepad.com/thisitchofwriting/2022/04/itchy-bitesized-11-who-says-this-make-sure-the-reader-knows-whos-talking.html?source=Snapzu