Change size of Tempo text in parts

[JonHargreaves]

Hi,

In making an orchestral score, I reset the size of the Tempo text, and the Boxed system text, to make them larger.

Now I am making the parts, I find that the instances of both these kinds of text are too big.

I have tried editing the Text Styles, but it has not changed anything.

Is there a way to change all the Tempo & Boxed System text in the parts, without having to go through and do each one individually?

Thanks.