futured image size in Post

By default the image should show full width + height.

The sizing can be altered in "Customize > Blog > Post Image".

Nope, it wan't. I set Hight + width to 0 (zero)
but it shows still white space on left + right side. Both, Preview on Frontpage (Mansory) and Post itself.
Title above the image or below dos not mather..
Hmm..

No need to set it to 0, just leave them empty.

Can you link me to a page where the full images aren't showing up?

If you mean removing the white space around the image, you could try this:

.post-image {
    margin-left: -10px;
    margin-right: -10px;
}

10px being your content padding value.

yeah, this did the trick - thanks tom.
Simply used your awesone "simple css" plugin with this code. Now im compleatly satisfied.
Awseome support here.

Awesome, glad I could help :)

im really sorry bothering you again. Im still in the process to figure the best layout for my blog.
Since i changed the old layout, where your CSS above was working, it is NOT working anymore now.

I have changed from "2-cols 1-sidebar right side" to "3-cols, no sidebar"
As you can see, the futured have white space on lft an right side (15px).

here my sandbox: http://www.sandbox.philippinen-blog.ch

How do i remove this 15px ?

thanks
Urs

I'm not seeing the above CSS added anymore.

Alternatively, you can use PHP to figure out the negative margin needed: https://gist.github.com/generatepress/b252781fe296fe698b9e