How can i add share buttons after each post

I am using Jetpack on our theme demo.
You can preview it here.

However, any other social sharing plugin will work just as fine.

Hi again
thank you for answer
I have a question about header picture
How can I add another picture next to logo ?

If i want put buttons without plugin in which file i shout put script of buttons?

1. There is not second option for custom header image, you can either use it to upload logo or use it as header image. For multiple images in header you need to either use CSS background property or add image directly in header.php file.

2. To add social media icons without plugin you should add them inside content-single.php file for single posts and content-page.php to for pages.