Chords alterations fonts

Hi, I just switched from Finale to Dorico and started my first project for a jazz ensemble.
I have a problem with chords, because the alterations (#9, b5, and so on) are really too small and almost unreadable.
I looked for the matter in many posts on the net but did not find a solution
I will be grateful for your hints
Thanks
Marcello

Welcome to the forum! First check out the many, many settings in Engraving Options > Chord Symbols. You can have alterations full size on the baseline if you want, etc., etc. There is a lot to explore and customize there.