To view the customization options for your finished story, click on Post, Share or Update in the top right corner of your editor (what appears on your screen depends on the state of your current story).
In the Share panel, select the 'OPTIONS' link.
This will open the customizations panel. Select the desired options for your story by ticking the boxes next to their description.
(For more information on Show story navigation, visit this page.)
(For more information onShow related, visit this page.)
When you're finished, click Copy Embed Code to grab the embed code with your customization changes.