One of the Trilium's goals is to provide fast and comfortable navigation between notes.
You can use alt-left and alt-right to move back and forward in history of viewed pages.
This works identically to browser backwards / forwards, it's actually using built-in browser support for this.
This is useful to quickly find and view arbitrary notes - click on Jump to button
on the top or press Ctrl + J . Then type part of the
note name and autocomplete will help you pick the desired note.
See Jump to Note for more information.