A person demonstrates how to unlock and open a window.
A man is finishing up the design on a wooden frame for a window.
a man in a room showing you the window and the lock
A man pointing out the lock on a window, and how to open it.
A man is standing by a window unlocks it and then lifts it up a little.
He is demonstrating on how the window can be opened.
A man is giving a demo on a window with a lock, he unlocks the window and raises it about 2 inches.
A man changes the setting on a window lock, and then prepares to raise a window, while speaking about the procedure
A man demonstrates use of a window while explaining the steps.
A man is instructing someone on how to unlock and open a wooden window.