once i was in a writers room with a writer who was not super nice and he wrote a script where some dialogue was in 6 size font and we were all like "hey man what is this" and he said it was to show someone was speaking from the next room

i think abt this all the time

FYI if u wanna be professional the right way to do this is to write the dialogue on a different piece of paper which you print and place it in the next room so writers have to go there to read it.

This is per the WGA and I know for a fact this is what Mank did

MANk who wrote the movie “Rosebud” about orsen wells