Here are the 8 links with the administrator view first (Menus >> Main Menu >> New) and then the front-end view that your users will see.
Default Login Layout - Allow People to Login to Your Site
Default Registration Layout - Allow People to Register on Your Site
Default Remind - Recover Your Forgotten Username
If you've forgotten your username for your account, Joomla will send a reminder to your email address.
- If you've forgotten your email also ... you'll have to ask the site administrator.
- If you are the site administrator and you've forgotten your username and email (!), try this tutorial.
Default Reset Layout - Reset Your Lost Password
Many people will use the same password on many sites (it's not a good idea, but people do it anyway). So for security reasons Joomla will create a new password for you rather than send out the old one. First, you'll have to enter a token that Joomla send to your email address.
Default User Layout - Just a Simple Welcome Message
To be honest, this is not much use. Sorry.
User Form Layout - Allow Users to Edit Their Account
If you'd like to turn off the bottom 5 dropdown boxes from Back-end language down to Time Zone, you can do that by going to Site >> Global Configuration >> System >> Front-end User Parameters >> set that option to "No".