Hi @quintenra 
Welcome to the forum!
You can do this by placing the element inside of a floating group. If you double-click on the floating group, you can change its position to be relative to the top or bottom of the page (or ‘both’ or ‘nothing’):
Or, if you have a footer, for example, that you would like to stick to the bottom of the page at all times, the floating group would be moved to the bottom of the page in the editor (with float: bottom selected):
That should do it!