Hi Luo,
Okay, I have identified where we are out of steps.
From your screenshot, I can see that you are in the row settings, but you are accessing them via the Layouts Gui for Posts.
Layouts recently made a change, and introduced the Content Layout Editor button on WordPress Pages, above the editor - I've been trying to use this option, instead of the full Layout settings page.
Screenshot 1.
On a Page, when using Genesis, you can choose from the standard Genesis layouts on each page. It is normally accessible from the area shown in this screenshot. It's normally the usual choice of main, with or without sidebars on either side.
I haven't actually been using this setting when creating with Genesis and Layouts, as in the past I've just been using layouts from its Toolset setting Gui, but....
Screenshot 2.
Actually in Layouts, when you go to apply the layout to an individual page there is a hint to get people to use the new Content Layout Editor, which is located on the page editor. It is suggested as a better work-flow, creating less clutter in the layouts admin - but like I say, I am generally happy using the layouts admin, all in one place etc
Screenshot 3.
The layouts content editor button on the page admin
Screenshot 4.
You can see in the top left of the editor screen for the page layouts content editor, that the default genesis layout is chosen, and as seen in screenshot 1, there is now no option to change this.
Screenshot 5.
The Row settings available from the Pages Content Layout Editor Settings. The choices which I showed you earlier.
As I mentioned earlier, I am just using the old layouts workflow, which is fine. But if I am doing something wrong, and there is a way to use the page content editor, and have no default sidebar, I am definitely up for trying to see how that workflow suits me too.
Thanks
Jeff