I tried everything, and nothing works. How does it work?

I believe it is turned off to keep people's sigs from making people have to scroll through a bunch of images just to read comments.

Foxtronix seems to have done it, How exactly I do not know https://www.lighting-gallery.net/index.php?action=profile%3bu=232, If you do figure it out... please Don't put a ridiculously large image in there.... something  like Foxtronix's is fine... but past that its just annoying.....

Vince might of done if before it got turned off he has been on this site for the last decade, but I agree if people put up large images in the signature it's pretty annoying, except on sites that you can hide that poster posts automatically..

I'd prefer it if signatures were just that, make them too complicated and they detract from the message.

I'd prefer it if signatures were just that, make them too complicated and they detract from the message.

I agree.