Captivate 6: TOC and Sublevels

Hi,

I am new to Adobe Captivate forums; only 2nd time visit.

I am using Captivate 6 and seeking help on TOC, Level and Sublevels

Is there a way to remove the Expand/Collapse functionality of a Level such that the sublevels are always displayed?

The Expand icon can stay as is; only want the Expand/Collapse functionality removed so that when it is clicked/selected, nothing happens.

Hope I have explained enough.

Thanks in anticipation