As i’ve said previously, we don’t have these kind of feature especially on Legacy Section Builder.
If you really need it, you can try to use this code below. But i’m not quite sure it will work fine for some reason, i just want to help you as long as we can. Please read our Support Policy right here : http://support.jegtheme.com/support-policy/ if you having big customization that required using themes, you may need to hire programmer to help you.
Please update this file section-content-builder.php on line 159 insert this code or something looks like this: