Manu size and page post

hello, you can increase the width of the menu, as I have all three rows.
other question you can lower the post page from the end of the menu?
thank you very much

Just use dropdowns. You can read more about WordPress Custom menu setup here. Otherwise there is not enough space to fit all your 3 lines of items on a single line.

ok, withouse use dropdowns?
you can increase the space between the white bar of the menu and the beginning of the page?