A few stock photos:
Rear gate swung open with glass up - Standard
Rear gate swung open with glass down - full retract prior to opening
Rear gate dropped open as tailgate - requires full retraction of rear glass
Rear gate dropped open and rear roof retracted - requires full retraction of rear window and additional retraction of roof (from either key at gate: extra turn, or from overhead console)
All pictures thus far show midgate in vertical position with window up as seen here;
Interior view, rear looking, with midgate window down.
2nd row seats in stow positions
Midgate lowered to closed position showing full use of bed space.