The SCNSIZ line defines the initial number of rows and columns. The default is 24 by 80. Under Windows, rows may range from 1 to 50, and columns may range from 1 to 160. Under UNIX, it depends on the capability of your terminal emulator. In most cases, you will be limited to 24 by 80 or 24 by 132. In the case of ZTERM (Build 144 or higher), the number of rows may vary from 1 to 50.