Active Menu Not Indicated Visually

Hi,

I noticed a problem that seems so basic that I must be overlooking something:

In the demo’s of Enfold the active menu is always somehow indicated, like with a different color, bold fond or underlining.
But I can’t make this feature to work, I tried all options in the Header Style config, but non of these enables the active menu selection indication.

It tried it on two platforms (on-line & MAMP), two browsers, different themes, cleared caches, etc etc … but non make it work.

Again, this seems so basis … so what’s going on?

thx,
Tom