Though Cinnamon comes with a settings tool you can not yet customize it to the fullest. This is because it still is under heavy development and it is even not yet recommended to create super-creative themes, since it is likely that functions will be altered or added in the near future. Nevertheless, I have searched ... Read more
You usually notice this error due to the lack of a menu bar and all kinds of window decoration after you unsuccessfully played with your Cinnamon settings or just suffered some kind of other error. If you then try to reset Cinnamon or to use any other command involving the desktop environment, you will get ... Read more
To manually install new themes for cinnamon from the page provided by Cinnamon Settings, first backup the data of the original theme by opening a terminal and entering sudo cp -R /usr/share/cinnamon/theme /usr/share/cinnamon/theme_backup Then download and unpack another theme from http://cinnamon-spices.linuxmint.com/themes, save the files to some location - I will save them on my desktop. ... Read more