How do I hide/collapse the AP fluid WorkCenter?

How do I hide/collapse the AP fluid workcenter?

The AP classic workcenter has an icon which allows you to “hide” the workcenter so that the full screen is available as a working area.  See attached print screen.

On the fluid workcenter, I expected to see something similar.  There is not. When I googled, I found an HR example which shows an icon that can be used to hide/collapse the a fluid page.  When I look at other fluid pages, I can see the icon.  However, I don’t see any icon on the AP fluid workcenter page.  Logically, I think there has to be some way to hide the workcenter.  When using the workcenter on an IPad or phone, you would need as much space as possible for your working area.