I have a problem with my system, the taskbar has shrunk and I can't access the taskbar settings menu to fix it, what should I do? I'm a beginner in the Linux system.
Welcome to the forum! Just doing a quick flyby, I just put this in general help.
You didn't happen to leave your taskbar in the pool, have you? 
Welcome to the Forum!
Could You specify what You mean with ''shrunk''? Do you mean the Length or the Height?
To come in the Taskbar Settings, You could simply make a right-click on the Taskbar:
Or You use the Extension Manager. This Program is available in Gnome Software as a Flatpak:
When you have installed it, open it and on the ''Installed'' Tab scroll down until this and click on the Gear Icon:
