The background navigation bar transparent does not show

[MAXING]

Hello, I encountered a problem with my background settings, my top navigation bar is set to transparent, when I adjust the background image he can not show the transparent state, affecting me to adjust the size and spacing of his text, so I would like to say why the background can not intuitively show the top of the transparent state, I remember that it was not the case before. After testing the front page is normal, but the background actually can not show the transparent state, the navigation bar is just moved down, can you adjust the code to become transparent, so that I can easily adjust the text size and spacing dynamically!

[MAXING]

I'm referring to the fact that I can't show transparency when I set it up in my admin backend.