Can you create your own design?

Hi Vahid and welcome to E-learning Heroes!

You can easily create your own themes and templates in Articulate Storyline. Here's a great overview of using and creating Storyline Templates. 

We have some tutorials on using Storyline's slide masters and using themes to control image and text alignment. 

Here are a couple screencasts I put together on using Storyline's slide masters to manage text and image placement. 

Using placeholders to ensure consistent image alignment

How to maintain consistent alignment of text and headings

+1

Thanks for the links David.