To configure the general layout of your website pages in Tiam you have to go to Appearance->Customize from your WordPress dashboard.
Then click on Tiam: Pages Settings.
Here if you want to customize the general layout you have to click on Layout link.
Here you can configure the title appearance (in visibility and alignment), the content layout (boxed or unboxed), the background and border color, and the comments visibility.
When you’ve done with your settings just click on publish button in the top left corner of the page.