|Nautilus, the file explorer that comes by default with GNOME, we allows to compress selected files simply by right-clicking on the selection.
In addition to being able to set the name of the compressed file, we can also choose the compression method, the folder where the file will be saved and even (if the selected format allows it) we can split the compressed file into as many parts as we want. However, Nautilus does not allow us to configure something as important or more important: the level of compression.
Steps to follow
1.- Press Alt + F2 and write gconf-editor.
2.- Edit the key: / apps / file-roller / general / . The supported values are: very_fast, fast, normal, maximum. Remember that the faster the compression, the lower the compression level (that is, the larger the final file will be).