You can't. That is a mistake in the brochure, and the reviews were likely with pre-production models or models that just don't make it to the show room.
Hopefully Suzuki will smarten up and put the same seats in that the Aerio had with front and back height adjustment.
Not having a height adjustable seat is just plain silly. And for people like me, having it only raise at the back is silly too.
All cars should have front and rear seat height adjustment since the proper driving position is not only for comfort, but for safety too.