Type directly into the Additional Directives field on the Assembler tab of your project properties Assembler page.
NOASM only performs the macro pre-process stage, and it passes undefined opcodes and macros through to the .bal file. Setting NOASM is equivalent to just running the macro pre-process stage of the previous Micro Focus Assembler product, MF370. NOASM is particularly useful when you want to preprocess BMS macros to produce a file than can be input to the CICS BMS screen painter. See BMS Screen Painter for more information.