What emulator are you using? (iSeries Access,TN5250, RUMBA)
The simplest and by far best way is to use an editor that does it for you, e.g., WDSC or RDi. Do <b>not</b> modify bytes in source code to trick display files into thinking that display attributes are in undefined fied positions on the screen.
Sooner or later, your source code will need to be processed by a second system. You might get a separate development system, or you might actually migrate to using a PC editor such as WDSC. It will happen.
When it does, you are not going to want control characters scattered through your source code.