How to turn on Live Portfolio on Fiverr

Hi everyone,
I am new seller in fiverr,somehow i manage to get 2 order.I wanted to show more than 3 sample images in my gig so i did some search and found that i have to turn on live portfolio on.
but it won't let me to turn on, i am attaching screenshot here.
Thanks

i think my insert image is not working, here is link
http://prnt.sc/czb4q3

Still looking for answer please