Board Thread:Support Requests - Getting Technical/@comment-24789339-20140510023123/@comment-452-20140511141218

I've found a way to trick it into being displayed:

Apparently that button never appears in Forum Threads anyway, so here's that example in the sandbox

But once you add an image, the blank first image stays there, so you would be better off making your own "" with some instructions in it to remove that image was adding new images.

Still, you should definitely suggest the button being displayed when empty to Special:Contact.