Click on your name at the top right corner of the page.
From the drop down, select My Account.
Select the General tab.The account details page is displayed.
Hover over the line you want to edit and click on the pencil. This makes the line editable.
Make changes and click Save.
To change you email preferences, select the Email preferences tab.
Check the boxes against the options you wish to choose. Click Save.
NOTE: although there are red asterisks next to each line, you do not need to tick all the boxes.