Is it possible to hide the non shown chords in the parts?
Its really annoying to do layouts with those…
Those are chord symbol Signposts. Just hide them if you don’t want to see them.
(and welcome to the forum!)
great, quick fix!
Thank you so much!
Hi @nicoweb43 ! Welcome to the forum.
Just so you’re aware, the signposts don’t print. They are there to help you know what’s going on in your project. Sometimes they can, as in your project, get very busy. You can choose to turn them off individually or all of them if you wish but many of us find them helpful. (There might be a key command to toggle them on/off. If not, you can assign one!) 
— Jim