Automatic floating selection/layer - only one method mentioned in section 16.4.5.2
Section 16.4.5.2 only mentions Ctrl + Alt although it does reference section 2.1.1 which gives both combinations and their different effects. When I search for "Gimp floating selection automatic" (without the quotes) the first link I am offered is to section 16.4.5.2. Not a big thing but I still think that this section should either mention both key combinations or not show a key combination and expect the user to click on the link to section 2.1.1.