How to exclude selecting headers in a file when ctrl a select all or ctrl home go to beginning of a file in vscode?

eg:

Given a markdown file

<link href='G:/Using/mdCss/style.css' rel='stylesheet' />
<link href='./style.css' rel='stylesheet' />
<!-- some random header info -->

This is the content.
Some random sentences.

Current behavior:

press ctrl a

you select all of the lines.

Expected behavior:

Do some configuration.

eg: put a comment as separator.

<link href='G:/Using/mdCss/style.css' rel='stylesheet' />
<link href='./style.css' rel='stylesheet' />
<!-- some random header info -->
<!-- ctrl a dont select above -->

This is the content.
Some random sentences.

press ctrl a

you will only select:

This is the content.
Some random sentences.

_end

Is it possible?

• Same logic for ctrl home.
• Not just for md, also for html, or other programming languages.