When you are first in Avada Live, the only things that really differentiates it from a front-end page is the Toolbar along the top, and the few icons overlaid on the content. It is when you mouse over these icons, that you can fully see and access the Element Controls.
There are Controls for every part of the page that can be edited. There are Container Controls, Column Controls, and individual Element Controls, as well as Nested Columns and separate controls for both Parent and Children items in Elements that use this structure. Just mouse over a content area and you will see the Element Controls for whatever content is there.
Take a good look at the image below. In this example, we have moused over the Content Box on the far left, and we can see a number of Element Controls: