The @VDT statement can be used to set the screen format in F mode.
Operation  | Operands  | F mode, L mode  | 
@VDT  | [ { F1 | F2 | F3 | F4 } ]  | |
F1  | Sets the screen format to 24 lines and 80 columns. This format is also set   | 
F2 F3 F4  | Sets the screen format to 27 lines and 132 columns. Sets the screen format to 32 lines and 80 columns. Sets the screen format to 43 lines and 80 columns.  | 
The screen formats F2, F3 and F4 are only supported by DSS 9763. If a terminal does not support a specified format then the statement is rejected with the error message EDT4945.
If the @VDT statement is entered in a statement sequence or in a statement block in BLOCK mode then it is the last statement to be executed after all the others have been processed.
The @VDT statement implicitly terminates the display of two work windows.
In batch mode, this statement is ignored and no error message is issued. In L mode and when output is sent to SYSOUT (provided that SYSOUT is assigned to a terminal) then the screen format F1 is always set.