I've been using beautiful.ai to make slides. I like it, but it takes control over font size, and does so poorly - it frequently chooses a font size that is just

I've been using beautiful.ai to make slides. I like it, but it takes control over font size, and does so poorly - it frequently chooses a font size that is just too big for the space, in which case it blots out the text with an error message telling me I have too much text. If I ADD another character or word, it pushes the font size selector to the next smaller font size and now my longer text is ok where my shorter text was previously too long. There is no direct control over the font size, just this badly implemented system-controlled size picker.