instruction: I want to use the Dropbox app to view the recipe book's PDF file.

previous_actions: 

active_application: Dropbox

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      }
      class_name: "com.pspdfkit.internal.views.document.DocumentView"
      is_scrollable: true
      depth: 17
    }
    nodes {
      bounds_in_screen {
        top: 7821
        right: 1440
        bottom: 3036
      }
      class_name: "com.pspdfkit.internal.views.document.DocumentView"
      is_scrollable: true
      depth: 17
    }
  }
}


assistant: !FUNCTIONCALL{"name": "scroll", "parameters": {"direction": "down"}}