To answer your question about custom layouts If you click on My Mibba, you will see a light blue bar on the page when it loads. On this bar, it will have words like Profile, Blog, Poems, Articles, and Stories. If you hover your mouse pointer over Stories (just let it sit over the word), a drop down menu will appear. The last option is layouts. Click that, and you will see the option to create a new layout. You can play around with the layout maker, and once you have a new layout, save it. (Make sure you make it easy to read and follow all of Mibba's rules.) After that, you simply select the name of the layout you'd like to use on the story's main editing page (the page where you set up a new story or the page to edit an existing story). You will now have a custom layout for your story.
For nearly everything you might need help with, you can find a link to Mibba's Knowledge Base at the bottom of most pages.
If you have any more questions about the site or stories, please feel free to message me!
Uhm, I do have a question. As I was searching for different stories, I kind of checked that most of them are in custom layout. I want to design the layout of my story too. How do I do that?