In the Modify Features pane,  Duplicate Vertical 
   copies multipatch and z-enabled features vertically, constrained to the z-axis of your data. You specify the vertical distance you want to maintain between each duplicate feature and how many features you want to create. 
In scenes, you can enable a z-handle and drag a preview of the feature to set the distance with the pointer. As an alternative to using the pane, you can right-click and use the context menu in a scene to create single features at a specified offset.
Duplicate vertical
To duplicate a 3D feature vertically, click Duplicate Vertical  
, select the feature, specify the offset and number of duplicates, and click Duplicate. 
- On the Edit tab in the Features group,  click Modify 
.The Modify Features pane appears.
 - Expand  Construct  and click Duplicate Vertical  
.The tool opens in the pane.
 - In the pane, click Select 
 and select the 3D feature.The selection appears as a list in the pane.
 -  To refine your selection, right-click a feature in the list and use the following commands on the context menu:
-    Flash 
—Flashes the selected features in the map. - Zoom To 
—Zooms the view to the selected features. - Pan To 
—Pans the view to the selected features. -      Only Select This 
—Removes all other features from the selection. -   Unselect 
—Removes the feature from the selection. 
 -    Flash 
 - In the Vertical Offset text box, type the vertical distance you want to maintain between each duplicate feature.
 - In the Number of times to be duplicated text box, type the number of duplicate features you want to create.
 - In a scene, you can enable the following settings:
- Preview—Displays a preview of the new features before you create them.
 - Z handle—Displays a z-handle that you can click and drag vertically to locate the duplicate feature instead of typing the offset value.
 
 - In the pane, click Duplicate.
The feature is duplicated vertically.