The sash is attached to blue conrod of a 6bar mechanism. Push/pull the sash to open/close the window.
Red slider has friction shoes (not shown) that are pressed towards violet runway thus holds the sash at a desired position against undesired movement by wind, weight or the like.

STEP files of this video:
https://www.mediafire.com/file/i62r1v...
Inventor files of this video:
http://www.mediafire.com/file/eufu9i9...