Each user can select the line density that suits them best. A high density fits more text on the screen but is less comfortable to the eye. A low density is more pleasant to work with but does not fit as much data on the same screen.
The 3 densities can be selected in the settings menu, or more conveniently through keyboard shortcuts. To use the shortcuts, press the first key, release and then press the second key and release. Do not press both keys simultaneously.
More keyboard shortcuts can be found in the help menu under the help_outline icon in the interface.