The Vanishing Scrollbar
Modern versions of Ubuntu, utilizing the GNOME desktop environment, attempt to maximize screen real estate by employing “overlay scrollbars.” Instead of a permanent, thick scrollbar taking up pixels on the right side of every window, Ubuntu hides the scrollbar until you actively move your mouse cursor near the edge of the screen, at which point a thin line appears. While aesthetically pleasing, this behavior is a nightmare for accessibility and usability, particularly on large monitors. You cannot easily glance at a window to see how far down a document you are, and you must constantly perform a precise “hover” gesture just to grab the slider.
Restoring Permanent Scrollbars
To improve usability and completely disable the overlay scrollbars in Ubuntu, forcing a permanent, classic scrollbar to always be visible, you must modify a hidden system setting using the terminal or the dconf editor.
The fastest and most reliable method is using a single terminal command. Open your terminal (Ctrl+Alt+T). You will use the `gsettings` command to alter the GTK preference. Type or paste the following command exactly: gsettings set org.gnome.desktop.interface overlay-scrolling false. Press Enter. The change takes effect almost instantly. Open a new window (like the file manager or terminal itself) and observe the right edge. A permanent, thick, highly visible scrollbar will now be present at all times, making it significantly easier to navigate long lists and documents without relying on hover mechanics.