How to shorten window blinds?

there should be a little button on the bottom piece that you can pop out...this allows you access to where the strings are tied. Undo the knot and remove the rigid bottom piece freeing up the moveable slats. Remove those that you don't want, trim the support strings and retread back into the bottom. Knot the strings so that they don't come out and pop the button back on

There are several u tube bird is that explain it

Videos not birds

Holly's got it down pat. I've done this and it's easy. You'll be happy with the results. Best of luck.

Well said Holly. I have done this more than once and it works!

Thanks everyone.

Found these great instructions for you: Remove the plugs located on the bottom side of the bottom rail to release the string ladders and the knotted lift cord. Undo the knot in the lift cord and pull up the lift cord enough to release the slats you need to remove. Remove the bottom rail and the slat(s) necessary to shorten the blind to the desired length.

Thanks to all. Going to give it a try.