Q&A for How to Log Out of Twitter

No, none of your data is deleted when you log out. When you log back in, you'll have access to all of your tweets and messages again.

While there is no specific way to log out of all of your devices at once, a quick way to do it is to change your password. When you change your password, you are immediately logged out of all of your devices.

Log out of your Twitter account, as explained in the article, and then simply press the register button. You can then follow the registration process for your second account.

Go to your profile page and click the wheel symbol next to "Edit Profile" and select "Sign out".

Yes.