Hurray I found the Markdown Style Guide

While Just Browsing and understanding how the community works, I found one of the most interesting part of steemit which is the markup style language.
I actually find it from a link I click down here when trying to write my previous post.
and with reading all of the Styling Guide, I realize so many things I could do with the markdown language
First of all, I inserted that picture above from this Place
and all I learn all of this

How I make this text bold text bold and how to reduce the boldness

How this text becomes italic

How I list these items

1. Item 1
2. Item 2
3. Item 3
   Also how to add link
   click Here to go to my blog
   How I add that image above from another source.