Navigation sidebar / Page index:

You can access the page navigation bar by moving the mouse close to the right section on every page
Path Navigation:

You can jump between parent pages by using the pages path on the top left corner
You can press Ctrl+P to open the Notion search bar.

You can use the database tools for custom searches and filters:

In almost every tool, you can identify to which context belongs by checking the red identifier at the beginning of the tool page:
