[Search GUIBB] Hide operator

Hi,

Let's say that there is only 1 available operator (equals for instance) that I would like to hide to the user.

Is this possible to hide operator in Search GUIBB?

I though I had seen this in 7.31 or 7.4 new features but can"t find it...

Administrator personalization is of no use because user can add new criteria and operator is shown on these new lines.

Thanks in advance.

Best regards,

Guillaume