For Example
This Page
%% Place for Index 01%%
# Heading 01
lorem Ipsum lorem Ipsum lorem Ipsum lorem Ipsum lorem Ipsum lorem Ipsum lorem Ipsum
# Heading 02
lorem Ipsum lorem Ipsum lorem Ipsum lorem Ipsum lorem Ipsum lorem Ipsum lorem Ipsum
%% Place for Index 02%%
### Heading 03
lorem Ipsum lorem Ipsum lorem Ipsum lorem Ipsum lorem Ipsum lorem Ipsum lorem Ipsum
### Heading 04
lorem Ipsum lorem Ipsum lorem Ipsum lorem Ipsum lorem Ipsum lorem Ipsum lorem Ipsum
Outline Is
Heading 01
Heading 02
And then if I want to check Heading 02. I just can click Heading 02 and check for it. And this is the Index 01
For Index 02. It will be
Heading 03
Heading 04
So that it would be convenient to navigate through out the page.
This is not required to be necessarily on the page itself. But may be any option to view the outline and navigate.