Enter password, usually have to enter it a second time... then you save it.

Since this is in the routers section I can assume you want on eof the following:
1. Passphrase to protect your wireless
2. Password to protect your router's web interface

So, tell me which one it is you are interested in and we can help you. Also, we will need your Operating System, Router make/model and browser type (IE, Mozilla, Chrome, etc.. )