From 3bf39c6146f6c6dda0b6a0ab77256a511a7e43ed Mon Sep 17 00:00:00 2001
From: manishkaa <35163295+manishkaa@users.noreply.github.com>
Date: Thu, 8 Nov 2018 04:12:35 +0530
Subject: [PATCH] Add "Unit Information" (#22113)

* Add "Unit Information"

* Fixed formatting
---
 guide/english/css/margins/index.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/guide/english/css/margins/index.md b/guide/english/css/margins/index.md
index ca74ab1644..dfcdd4f4cc 100644
--- a/guide/english/css/margins/index.md
+++ b/guide/english/css/margins/index.md
@@ -53,6 +53,10 @@ An element can be aligned to the center by making it a block element and changin
 }
 ```
 
+## Unit Information
+ - Pixels (`px`) are relative to the viewing device.
+ - `em` implies relative to the font-size of the element (2em means 2 times the size of the current font).
+ - `%` implies relative to the parent element.
 
 ## Browser Support
 It is effectively supported in all browsers (since IE6+, Firefox 2+, Chrome 1+ etc)