Boox Color Series User Manual page 39

You can disable the Floating Toolbar by going to Setting - General Setting.
When it is contracted to the edge, you can swipe from either side of edge
to the center of the screen to expand it.
When palm rejection is enabled from the Floating Toolbar, it only applies
to the reading document. The Floating Toolbar still supports hand touch,
but it can remove the interference of hand when you write on the reading
document.