Set the height of story by changing the height of the walls/columns

• This add-on palette can be always open and dockable, like
  a navigation palette.
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• Set the height of the current story and it modifies the height
  of all or selected walls/columns belonging to this story
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• Shows the height of the current story when you switch
  between stories.
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• This feature is part of the Archicad from version 17!
• This add-on is not included in our add-ons from this version.
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• OS: Windows, MAC OSX 10.4 or higher.

You can find the Story Height Simple Add-On under the Window menu: