Shame on me! I use base & was still on the TEMP shellstyle while testing
so that was that : Shellstyle > Shellstyle:LibraryPaneTopViewButton > atom(TopViewPrefix) > Element
thx 4 thee answer...
As usually, I wanted to turn this segoe font to the one used in what I build.
So I had to add a font property to the base shellstyle :
font="gtf(TEXTSTYLE, 4, 0) was in the tag bellow and suits well in my case.