Right now, we only show bounds lines above/left of the highlighted element. We should also show lines below/right, so we can compare positioning with other elements (e.g. Flexbox alignment).
Created attachment 358829 [details] Patch
Created attachment 358830 [details] [Image] After Patch is applied
Comment on attachment 358829 [details] Patch r=me
Comment on attachment 358829 [details] Patch Clearing flags on attachment: 358829 Committed r240044: <https://trac.webkit.org/changeset/240044>
All reviewed patches have been landed. Closing bug.
<rdar://problem/47324576>