enlarge the picture

Hello. Thank you for a great theme.

There is an option to click on the arrow and the picture increases. If you click again, the window returns to place and the title of the website appears with animation.

I have a question. How to make so that when loading the main page the picture was big, but in order to reduce it and view the contents page click on the arrow? And even better to at boot after some time the window itself was raised and showed the visitor the animation.

Thank you