thanks both of you.
But it seems I still need some help. I liked both ideas, but when I tried to position it, I cound't find the way to move it, it was always moving in relation with the center area, no way to put the menu inside.
and when I tried to do the background of the menu like the background of the center area, the menu looks always positioned to much to the left, I needed to make the box shorter on the left and longer on the right. I can't find the way to make shorter on the left. And also no way to put both together in order they look in the same box.
I will appreciate any kind of help, I am learning at the moment and any help is welcome
You can see how it looks at the moment, I did the menu background black, just for the contrast, I can change to opacity at any time
Look forward to hearing from you,