Cord-operated curtain tracks

The cord itself typically means curtains can’t be opened or closed when pulling the fabric of the curtain by hand. 

As a general rule; Slide can control your curtains only if you are able to do so by hand (by pulling the fabric, not the cord). 

Often the internal cord prevents the movement of your curtain runners if they are pulled or pushed. However, if you're able to move the curtains without using the cord mechanism and just pulling on the fabric of the curtain, Slide can do so as well.