Distinct difference in menu for second level of Visualization Structure

[p_xatzi]

Hi,

I noticed that when inserting a second level in visualization structure, there is no special difference in the selection menu except for some small indent (also in visu it nice that you can pop up and "isolate this level"). Is there any way to make the difference of levels more distinct. Let' s say by changing colour of descriptions or having the possibility to expand/collapse e.t.c. ?

Thank you in advanced.