Achor component to bottom of app. Make app full size

Is there a way to make a component always sit at the bottom of an app? I have other components above that I want to resize as needed, but I'd like one component to always be at the bottom.

Can I make the app take up all space available to it (ie browser window size)? I'm making an app to show data on a great big TV screen. I don't want it only using the top half of the screen when there's not much data to show in the middle.

Edit: I am putting everything in a tabbed container. So I want that to fill the available space, and a component within that to always sit at the bottom.

You should be able to make the tabbed container the full width of the app and then select fixed as the height