设置2个监视器以在XFCE4上扩展使用。

xrandr命令是我们今天需要的命令。
它用于设置屏幕输出的大小，方向和/或者反射。
显示输出状态：

$xrandr
Screen 0: minimum 320 x 200, current 3600 x 1080, maximum 8192 x 8192
DFP1 disconnected (normal left inverted right x axis y axis)
DFP2 disconnected (normal left inverted right x axis y axis)
CRT1 connected 1680x1050+1920+0 (normal left inverted right x axis y axis) 408mm x 255mm
1680x1050

60.0*+
1400x1050

60.0  
1600x900

60.0  
1360x1024

60.0  
1280x1024

75.0     60.0  
1440x900

75.0     59.9  
1280x960

60.0  
1280x800

60.0  
1152x864

60.0     75.0  
1280x768

60.0  
1280x720

60.0  
1024x768

75.0     70.1     60.0  
800x600

72.2     75.0     60.3     56.2  
640x480

75.0     72.8     67.0     59.9  
CRT2 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 598mm x 336mm
1920x1080

60.0*+
1680x1050

60.0  
1400x1050

60.0  
1600x900

60.0  
1360x1024

60.0  
1280x1024

75.0     60.0  
1440x900

60.0  
1280x960

75.0     60.0  
1280x800

59.8  
1280x768

59.8  
1280x720

60.0  
1024x768

75.0     60.0  
800x600

75.0     60.3  
640x480

75.0     59.9

我们希望较小的显示器(CRT1)位于较大的显示器(CRT2)的右侧：

$xrandr --output CRT1 --right-of CRT2

如果要在系统启动时自动扩展屏幕，请将命令添加到"会话和启动"。