I have blinds on my new windows and the blinds are too long for the window opening. My guess is this is done to make them universal. How do you remove the excess and reattach the bottom?
If these are slatted miniblinds, each of the vertical strings goes down through the bottom rail and is held in place by a little button. Once you pop out those buttons with a small screwdriver, the strings are free and you can remove the bottom rail. Then you can un-thread the extra slats and re-thread the bottom rail back on, cut the strings and replace the buttons.