Hi, there's no option to show the metadata window automatically. It only opens from the right-click menu. But you can get most of that info on screen as you scroll: put tokens like ~g_manufacturer, ~g_year, ~g_genre, ~g_players or ~g_played in any Text element in your layout. If you've got controls.ini set up, ~c_control and ~c_details work too.
What you're after, the full metadata showing up by itself as each game is selected, is a good idea. I'll add it to the feature request list.