If you’ve followed the installation steps in the User Guide (Documentation/User Guide.pdf in the archive you got from ThemeForest), then you now have a ‘Theme Options’ item in your WordPress Admin Panel. From there you can control the layout settings. Looks like this:
There you can select the layout you want to use and choose whether you want to display the first post with a big thumbnail.
Thank you very much for your explanations Paul, it’s working !
And i have an other question to ask you btw…
Do you know if it’s possible to change the background color ? Cause actually I changed the accent color but the theme doesn’t have any feature to modify the background color (set up in white by default).