You can insert a link to another page in each note.
Examples of links:

The search of page begins at the root of the tree - /Key Features/Search.

The search of page begins from the current note, but as "Key Features" note does not exist, search begins from the root again - Key Features/Search

Link to the subpage (subnote): Nested Page

If a link begins with a forward slash (/Page 1/Page 2…), a search of this page begins from the tree root. If a initial forward slash does not exist (Page 1/Page 2…), then the program will search a page beginning from a current page, and if it's not found - then the search beging from the tree root again. If the page is not found - nothing happens.

Wiki pages support its own link syntax.