Here's a video (a bad video -- but I couldn't find a better one) that shows how a skilled liner installer 'walks' a wrinkle.

BUT you have to mostly DRAIN the pool first, and you have to VACUUM the liner into place to keep it supported while you drain it, but I couldn't find a video.

If you don't do this correctly, you'll destroy the liner. You can NOT do it at all if the ground water level is still high.

Bottom line: this is a problem that's usually better left to those with the liner vacs and the experience.