I know that i can change the format to bold with ='<b>' in text format of the expression but how can i change the size?.
I know that i can change it with right click in the cell and selecting "customize format cell" but that change the entire dimension or the entire expression. This isn´t valid for me.
I had the same situation. But I could not do it. In pivot tables you can change the style. In bar charts, value on Data point you can change it ¿: ='<H1>' to H6.