I also can’t get the font size to change when I click on ‘Size +’ under ‘Text Size’ in the grey column that opens when I choose the ‘text’ tab. (like they did in the ‘help videos)
But when I click in the text box another box of controls appears right under the text box that gives me this option (and others) – it seems to work. Perhaps I get this box because I clicked on ‘load editor’. Not sure.