Footer Modul Position fix to the screen base?

Hello
I'm using the Template "Adventures" with Joomla 3.6.5
If there ist just small content in the article, the modul position "footer" is not at the lower border of the screen, she content shifts the module position down.
Is there a possibility, the footer to fix at the lower border, if the content is not yet big enough to shift it to the lower border?
Thanks for a quick answer.

Bernhard