How to customize default Comment box in blogger

At first read Lesson-2 before Start.... lesson-4
Step-1:

• At first log in to your blogger account 
• Click on Settings ‣‣①
• Next click on Posts, comments and sharing ‣‣②

Step-2:

• Look at Comment Location ?
• Click on Embedded ‣‣③

If you select Embedded comment box will be show at your post footer as like below

If you select Full page or Popup window you can find only a link Post a Comment 

For practical experience just select one by one then Click on top right side Save settings and then go to your website and click any post and view changes.

Step-3:

• Who can comment?

Here are 3 option. 

1. Anyone means all person(google user, only name=url/email submited person or name/ details hide person) will be able to comment. (I will suggest you for use it)
2. User with Google Accounts means only google gmail loged person able to comment. (you can use it for spam comment protection)
3. Only members of this blog means your pre-selected members only able to comment. (donot use it, it is useless)

Step-4:

• Look at Comment Moderation ?

Here are also 3 option.

1. Always means: every comment will be waiting for an admin/ moderator accept. After accept comment will be visible on your site. (I will suggest you for use it, when you are fully active on your website and your post comments will be sensitive.)
2. Sometimes means: If anyone do comment in your old post, you will be notify for moderation. after your acceptance comment will be visible on your site. But new post... Comment will be visible without your accept action.
3. Never means: All comment of all post will be visible automaticaly on your site. (I will suggest you for use it)

Step-5:

• Show word verification ?

If you select yes, visitors will be face google captcha for comment publish. (it will be protect spam comments)

Step-6:

• Comment Form Message

If you save any text in this box, this text will be show top of your comment box.

Note: After any change, Click on top right side Save settings