In this article, we will show you a few methods for customizing the dock panel in the default GNOME desktop environment on Ubuntu 20.04 Focal Fossa Linux.
It’s the extend-height false setting. If it’s set to true then it will take up all of the available space on the display depending on if your dock is positioned on the side or bottom. Setting it to false means it will only take up the space that the app icons need.