How could I convert vertical pages in horizontal pages A3?

Dorico
1

All is in the title

Why something very simple like this is not easy to do?

2

I’m afraid I don’t understand the question. Are you trying to switch the orientation of your page from portrait to landscape? If so, you’ll find that option on the Page Setup page of Layout Options.

3

Yes !

Thanks (I was unable to resize the staff as well but that because of very strange translation ! )