Go to Blog Settings under your name.  Go to the Signature section.  It has all the editing controls to insert pictures and links there.  Just may need to highlight the image when you click the link button to attach the link to the image.  If you have to code it manually do this:

<a href="http://www.YourSiteHere.com"> <img src="http://www.YourSiteHere.com/FaceBook.jpg"> </a>

You can also use AR hosted images here, just need to get the full path and replace the stuff inside the img src="" with the full link.

Marco Giancola you got pretty good answers....and it's not that difficult.

Glad you asked this one! They seem to have changed it recently and I hadn't even noticed!

Ryan has told you how. Many do not have their signatures set up in their blog. You can add all types of icons and links to social media and your webpage using this section. You can also do it in the right margin section of your page which means you go to the blog setting to add.

Ryan Huggins - Thousand Oaks, CA seems to have the answer. Great question, Marco. 

If you're talking about the share buttons already on Active rain, then go to your settings page and insert your Facebook address.

You can insert a hyperlink if you're trying to get it in the blog. 

The "share" button should already be at the top of each blog post.

Great question, I am updating my stuff as well.

Good reply from Ryan, I need to re do these too.

I saw someone had their G+ and wondered as well 'follow ' 

Marco Giancola Do you really want other AR members going to your Facebook page?