Hmm...

[TechnoCat]

So I want to put something cool in my siggy:

And when I entered it in my siggy, it showed up, but when I submitted it, it didn't show up. So I was thinking, Nifty, maybe you could update the ability to put pics/gifs in your signature. Because it would be really cool if we could have photos and stuff in our signature.

 

[Nifty-Chicken]

This question is asked a lot over the years. A quick search of this section of BYC returns the following:
https://www.backyardchickens.com/se...=lastupdate&resultSortingPreference=relevance

Specifically this post: https://www.backyardchickens.com/t/280977/what-can-you-put-in-your-signature-line#post_3399427

 

[seminolewind]

Yes, but small ones. I've seen a site where you can use 4x6's. Kinda big.