IlyaBizyaev added a comment.
I think this line's goal is not really to separate the title bar from window content, but instead to make the transition smoother and emphasize style consistency. Take a look at these 2 screenshots, for example. F6267692: Screenshot_20180916_124803.png <https://phabricator.kde.org/F6267692> F6267691: Screenshot_20180916_124749.png <https://phabricator.kde.org/F6267691> The one without the line looks very rectangular and sharp for eyes, as if someone has cut window decorations aggressively. The other, in my opinion, has a more natural, friendly transition and shares color with application controls. I don't have user stats, though. REPOSITORY R31 Breeze REVISION DETAIL https://phabricator.kde.org/D10429 To: fvogt, #vdg, #plasma, ngraham, abetts, romangg Cc: IlyaBizyaev, romangg, mart, abetts, rizzitello, mmustac, broulik, anthonyfieroni, januz, rikmills, anemeth, plasma-devel, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, sebas, apol
