Right-click the drag bar/empty space of the ribbon palette. Make sure “Allow Docking” is checked. Click on the drag bar in between ‘Ribbon‘ text and the gear icon. Drag to the top and move around the cursor till find an outline of the docked ribbon will appear.
Best answer for this question, how do you Redock a ribbon in AutoCAD? To undock the Ribbon, right-click to the right of the tab names and choose Undock from the pop-up menu, as shown in Figure 1.22.
Correspondingly, how do I move the ribbon in AutoCAD 2021?