Once you have registered, or if you are returning to this site, you can login to the site. In the menu bar on the forum you will find Login. You will be prompted for your user name and password. If the combination is correct you will be allowed to navigate the forum as a user, rather than a guest.
You may also choose the time you want to stay logged in, or to stay logged in forever.
Note that the login procedure sets a cookie which expires after the given time - or never if you have chosen Always stay logged in. If you have disabled cookies, you will not be able to log in.
If you are done browsing the forum you may decide to logout. Perhaps you share a workstation with someone else, in this case you would want to log out of the forum upon leaving. When you are logged in you will see Logout in the forum menu, select this and the forum will log your user name out.
If you're trying to login to the forum but you forget your password or have lost it, you can retrieve it using the lost password tool.
On the login screen, next to the username field, there is 'Forgot password?' Click this to be taken to the "forgot password" form. Enter your username on this screen and press the Send button.
Your password will be sent to the email address registered to that username.
After your first login, you will want to set up your profile.