In the OpenThinClient Manager, create two new 60Hz monitor Devices:
With this modeline:
"1440x900" 106.47 1440 1520 1672 1904 900 901 904 932 -HSync +Vsync
You can use Large fonts and set the horizontal and vertical icon spacing to “55”.
With this modeline:
"1680x1050" 147.14 1680 1796 1980 2252 1050 1055 1058 1091 +HSync +VSync