Hello,
In the Template Manager under Javascripts you need to increase the value for Max Height to a value that shows the button below.
Multibox Max Height
You might also consider just modifying the padding of the containing cells so there isn't as much space between each input.
Ok, this is the naturally solution to this specific page. But my question is more general. It's possible that S5 Multibox Addon is not fully compatible with Ipad Tablet?
If I use this box to show, for example, an online help with hundreds lines of text (as I mentioned on first post), increase "Max Height" value isn't a solution. I need scrolling feature (on android tablet and desktop client it works perfectly).