Skew adjustment mechanism for a window covering

A system for adjusting a skewed rail in a window covering, the system comprising:

• a first spool rotatable to allow a first lift cord to be wound around and unwound from the first spool;
• a second spool rotatable to allow a second lift cord to be wound around and unwound from the second spool;
• a lift rod coupled between the first and second spools;
• and
• a skew adjustment assembly configured to adjust the first spool between an engaged state, in which the first spool is rotationally engaged with the lift rod such that the first and second spools rotate together, and a disengaged state, in which the first spool is rotationally disengaged from the lift rod to allow the first spool to be rotated relative to the second spool;
• wherein, when in the disengaged state, rotation of the first spool relative to the second spool adjusts an effective length of the first lift cord relative to the second lift cord.