Ideally you should see a big list when you mouse-over profile menu-item.

Or  you see a big list when you click profile menu-item

But in some case you see like this

The reason of this variation is that your account type is PERSONAL. It must be either premier or business to see that FAT list.

In the case of sandbox, there is another reason you might not be able to work .  please understand that also by clicking Sandbox issue in switching from one account to other.