How should a woman dress during the marriage proposal viewing.
She should wear her normal clothes, meaning she doesn't have to wear anything special, just her usual dress.
It's fine, so he can see her general body shape, her height, he can see her face and her hands, and there's nothing wrong with speaking to her but in the presence of
her family and so on, there's nothing wrong with that, inshaAllah, may Allah grant them success.