Placement of the logout button/link?

The most common placement pattern for a “Log out” button or link is within the upper right-hand corner of a screen. That is the place that has become the intuitive exit area for users, ever since Windows made that top-right 'x' the standard close pattern.

1. Which is correct logout or log out?
2. Why is logout button important?
3. What color should log out button be?

Which is correct logout or log out?

Logout is a noun, to be used like so: "go to the logout screen". Log out is an action, to be used like so: "you need to log out".

Why is logout button important?

A logout button in mobile surveys usually carries out two functions: saving the data that have been entered and closing the survey to prevent unauthorized entry; it is, therefore, an integral part of any online survey instrument.

What color should log out button be?

The set of login logout buttons is a normal looking login and logout buttons that can be used by any website. The login button is colored blue and the logout button is colored red.