Hi! I'm new to this program and I don't really understand most of it. First, English is not my first language so I'll try to explain my problem, but it might be wrong worded.
I was modifying a book when I closed the pannel that shows every archive inside it and I don't know how to restore it. Now when I go into Modify Book, it just says that I have to choose an archive from the archive pannel that appears at the left (but there's no pannel because I closed it and I don't know how to open it again!).
Please, I need help

Thanks everyone!!!