Onyx International BOOX Nova2 User Manual page 88

Full screen mode of Notes
When you switch to full-screen mode, you can choose whether to
display the Floating Toolbar.
When it is collapsed, you can call it out by swiping from the screen
edges.
Note: The full-screen mode is an independent note-taking mode. If you
exit, you will exit the Notepad directly. If you need a non-full-screen
mode, you can switch on the Toolbar;