Editing the open state of a navigation

I have been able to edit the normal state of the menu to what I want it to look like. However, I can’t figure out for the life of me how I can edit the open state. If anyone can help me figure out what I need to do I would greatly appreciate it.

Here is my site Read-Only: HERE

The menu is currently set to hidden. Change this property.

There’s also a background set to hidden