Display Topographic Information.
Ideas form chrome extension webdeveloper.
When you choose the Display Topographic Information
you can see the structure of the page like below. That can check your page is align well like what you want.
It is a amazing function. So I try to make a Sketch vision like the wonderful extention.
Foreach layers except the symbol
element.
ctrl alt cmd t
show the frame with a rgba(0,0,0,0.1)
shape
ctrl alt cmd b
show the frame with a rgba(0,255,255,0.8)
border
ctrl alt cmd z
clear all
Height%lightHeight!=0
it is error too.Of course you can ignore all the rule when your layer name with a _
start.