Design settings page for wide layout?

1. What should be on a settings page?
2. What do common web layouts contain?

What should be on a settings page?

The settings page can group different types of features: account information, notifications, image format, offline mode, storage, version, disconnection, etc. Each service offers the necessary settings depending on the features of the the tool. And the list could be long!

What do common web layouts contain?

Main content. The biggest region, containing content unique to the current page. Stuff on the side. 1) Information complementing the main content; 2) information shared among a subset of pages; 3) alternative navigation system.