Dos box size in Dosemu

Hi, Can anyone tell me how to change the size of a DOS box when using xdos as supplied with SuSE 7.3 I am trying to get a POS application running. It is running well except the size of the window. There are no grab handles in the corners to extend it and there is nowhere to change the font size which one would normally do in an xterm All suggestions greatly appreciated Keith Gibbons, Ireland