Can get Impress to use mutlitple font sizes

Working on a slide in Impress, I have two text blocks on the slide. I sent the font size on the first text block. On the second text block I wish to use a smaller font size which I set, but I find the text size in the first text block was also changed to the smaller size. I only select the text in the second text bloc when I made the changed.

Is seems that Impress is only allowing the use of one text size??? Can this be???

I am assuming some were there is a setting to fix this behaviour, but I can not find anything

Please upload a sample file for better checking your (or LO’s) problem.