A stupid question about the left-most "panel"

When I start DTP I get a panel to the left (contains globals, ‘Open databases’, etc) - what is it called? And how I set it to be hidden when I open a database?

It’s the sidebar, and can be hidden/shown with the ‘View>Show/Hide Sidebar’ command. Also, Beta 2 includes an icon to toggle its display in the Navigation section of the toolbar. If its hidden when you quit DTP, it should remain hidden when you launch it again.

OK, thanks