Docking my keyboard.

My keyboard had been appearing somewhat off of the bottom of my screen for a few days now. I’ve looked every wording for my solution, and everythign pints me to the small Keyboard icon at the bottom right of my keyboard, which would allow me to see the “Dock” and “Floating” options. However, I can’t access the “Dock” button even if I press and hold the keyboard button. The keyboard itself just disappears after I let go of the button, even if I hold the button for ten seconds or more. What do I do?