Stewben

I have Home Designer 2017. I have created a plan for a two story house with Gabled roof want to create a stairway to the attic space above the second floor. If I place a stair on the second floor going up of on the attic floor the stairs always reflect that they go up and in the Framing perspective view the stairs get located between the first and second floors. How can I create a stairwell to the attic level?