Comment 19 for bug 1759300

Enhancement request logged upstream to make the old dual behaviour available again:

  https://gitlab.gnome.org/GNOME/gsettings-desktop-schemas/issues/3

Unfortunately the modes are mutually exclusive in the current GNOME design:

    <enum id='org.gnome.desktop.GDesktopTouchpadClickMethod'>
      <value nick='default' value='0'/>
      <value nick='none' value='1'/>
      <value nick='areas' value='2'/>
      <value nick='fingers' value='3'/>
    </enum>

so you can't have both 'areas' and 'fingers' simultaneously unless you use the workaround in comment #18.