Hello, thanks for reply
As you can see, I have 3  hoover  image on line, so I can´t use extend option. 
What's the purpose to left that area without anything if header and footer have??
There's any way to use that area?

You could set the page width to fill the screen.

set template to non-responsive - set the width - and then set back to responsive.

Forget the post above - I think it requires some code instaed

But i want to  use several objects  in the row, its a normal desire, use all space on screen. i just want to know where i can setup that size. or its bot possible ?

Luis, it is not possible without using "special" code (not recommended).

There are optional objects which can provide the exact layout you require for full width display.

If it is possible to edit/remove the margins, then you must understand that this action would affect your whole website. Therefore, if it were possible, I wouldn’t recommend it unless you know exactly what you are doing.

If it is not possible to change the margins in your current site, then you will probably need to start over with your project with a template that doesn’t use margins.

I hope this helps.

Hello everyone,thanks for your reply
@Claudio D. , Thanks, it looks good, it works fine