Insert a putty knife underneath the decorative covers at one end of the curved shower curtain to unseat them. Slide them away from the mounting assembly with your hands.
Remove the screws from the mounting assembly to uninstall the entire rod, using a Phillips screwdriver.
Find the plastic rod connector. This connector is often transparent and seated between both sections of the rod. Push the rod connector out of its position with your hand.
Pull the rod out or in to adjust the size and push the rod connector back in place.
Place the mounting brackets back on the wall. Drill pilot holes, if applicable. Screw the mounting brackets back into the wall.
Find the plastic rod connector. This connector is often transparent and seated between both sections of the rod.
Pull the rod connector out of position with your hand.
Pull the smaller rod into or out of the larger rod to adjust the size.
Push the rod connector back in place to secure the adjusted position.