Hello! Before submitting an enhancement request, I wanted to ask if there already *are* possibilities to customize how the outline view looks.
[image: lyx-tree.png] (mirror for image: https://imgur.com/a/OFAVJCS) I could imagine that there's some utility that allows changing the Qt theme or something like that, but I wouldn't even know where to start looking. I generally find tree-views with lines as visual guides vastly more useful than the "modern" style of indicating the tree only by indication. My best guess here is, that Qt choosed a style that mimicks the native style of modern Windows, which I dislike in this particular case. I'm certain others will prefer the "line-less" styles, but for me having the lines would be very helpful in navigating large documents. - Klaus
