aligning the featured image

Hey there,

You could align it like this:

.entry-header {
	text-align:center
}

This will align the content the entry header class.

Take care.

Hey again.

There is a chance that the theme has a CSS field in the options, if not then you can make a child theme:

http://codex.ww.wp.xz.cn/Child_Themes
http://premium.wpmudev.org/blog/create-wordpress-child-theme/

Or you can instead use a plugin if you like:

http://ww.wp.xz.cn/plugins/custom-css-manager-plugin/screenshots/

http://ww.wp.xz.cn/plugins/my-custom-css/screenshots/

http://ww.wp.xz.cn/plugins/pc-custom-css/

http://ww.wp.xz.cn/plugins/imporved-simpler-css/screenshots/

Have a fantastic day! 🙂