it is possible with CSS.
1. Select that parent container and:
1.1 give it an Advanced > Additional CSS class of:
1.2 set the Spacing > Inner Container Z-index to
2. Now add your new container inside the parent container and give it a class of:
3. Add this CSS to your site:
You can adjust the
top and left` values. Note: 0 and 0 would position it in the very top left hand corner.