GNOME Tweak Tool or GNOME Tweaks (new name) is a free customization and settings manager for the GNOME desktop.You can use this GNOME Tweak Tool or Tweaks to configure Ubuntu’s new default desktop environment based on gnome from Ubuntu 17.10. It gives some additional options which is not present in the default settings app.
Using Tweaks you can hide your desktop icons, change themes, icons and cursor, manage extionsions,Adjust the default fonts and Move window buttons left or right.You can install the GNOME Tweak Tool/Tweaks via the Ubuntu software or via terminal.
Install GNOME Tweak Tool or Tweaks on ubuntu:
Open the terminal app in your Ubuntu system, type the below command in terminal and hit the enter key.
sudo apt update
Then type the ubuntu password. Then type the below command in terminal and press the enter key. It will install the GNOME Tweaks or Gnome Tweak Tool on Ubuntu.
sudo apt install gnome-tweaks
That’s it. To open the GNOME Tweaks, click the show applications in the Ubuntu Gnome dock and type Tweaks in the search box and click Tweaks.
You can also open the GNOME Tweaks via terminal. In terminal type below command and hit enter.