When our L6's ship from our factory, the hinges are generally quite stiff. If you cannot adjust the unit, please try applying more force, as if closing or opening a book, it will feel stiff, but do not worry, you will not break it!

The hinges will loosen up over time, but it will always take some force to adjust, as we want all of your devices used to be stable.

If this does not work, please submit a ticket at https://support.humanscale.com/support/tickets/new and we would be happy to assist further.