I haven't tried this but I think you don't have a lot of options. Somewhere in that version of Excel is a box that looks like this. It hasn't changed much since then

Pick the best option.

Somewhere else there is a box like this one. Play with the scaling option. I don't know if this combination will work or not for you. If not, you are left with making each cell a line by making the row height and column width really small.