How to Quickly Create a Link to Parent Page In a OneNote Subpage?

We know that you can create level 3 pages in OneNote.

1. We usually press the "Add Page" button to create a Level 1 page.
2. In the right menu of the page, click "Make Subpage" menu item once, the page will be demoted to Level 2 page.
3. Click "Make Subpage" again, the subpage will be demoted again to Level 3 page.

Create Link to Level 1 Page in Level 2 Page
In the following picture example:

•     "Sun" is level 1 page.
•     "Earth" is level 2 page.
•     "Moon" is level 3 page.

Now we're on Level 2 page "Earth", and click "Gem for OneNote" add-in -> "Link" tab -> "Hyperlink" group -> "Parent Page" feature.
It will create a link "Parent Page" in the upper-right corner of the "Earth" page.
Click on this link, it will jump directly to the level 1 "Sun" page.

Create Link to Level 2 Page in Level 3 Page

If you are browsing the Level 3 page "Moon", and click on this "Parent Page" feature of the Gem.
It will create a link "Parent Page" on the "Moon" page.
Click this link, it will jump to Level 2 page "Earth".