How to create a field of this type (photo in the description) in your component?

Question

1C-Bitrix

I wanted to create a field of this type in my component. I naively believed that it was made according to off documentation.
poke . But no.
Now I'm trying to figure out how it works in general, but along the way I decided to ask here. Perhaps someone has already encountered and can briefly give an explanation.
ps The picture is not inserted. Here is the link to clip2net