How to Save Logos and URLs in a Transactional Email

I am trying to save our different social media and other logos with their URLs to our Transactional Emails Signature (Advanced Options). How do I save these so they don't disappear? See screen shot. Thank you for your help.

Can you tell me how did you add those images to your email body?

From the "Logos" folder under Images.

Your image links have been repaired. Please verify that everything is now working correctly.

Yes, the logos and links seem to be working now. Thank you for your help.