Created attachment 288818 [details] 'Styles — Visual' cues There are already visual cues after changing values in the Visual tab. (see screenshot "'Styles — Visual' cues") It would be nice to have similar visual cues in the Rules view. Firefox already something similar, highlighting rules that have been manually changed or manually overridden by other manually add rules. (see screenshot "Firefox behaviour")
<rdar://problem/28300701>
Created attachment 288819 [details] Firefox behaviour In the Firefox inspector I manually edited the z-index value, and added a second border-radius that overrides an already present rule.