After placing a railing in your 3D model you can modify the railing’s components as follows:
-Right click on an existing railing and select “Modify Railing” from the pop-up menu.
-After the Modify Railing dialog box will opens, click on the “Railing Construction Settings” button.
This will open The Railing Construction Settings dialog box, where you will have the options to select which of the railing’s components will be modified. As each tab is selected the railing component will be highlighted in the 3D preview window indicating which of them will be modified. The railing settings (or tabs) are based on Rails, Posts, Balusters and Ends.
Once your modifications are complete, click ‘OK’ to commit these changes.
I'd like to know whether there is a way of editing the railing so that we only have one of the rails, or change the space between posts?