how to set alignment - Justified in item Additional description printout

Go through the PRINT code - as relevant to your Invoice mode of printing.
In above you are not only changing the alignment, but also the Width -- which for printing purpose will be having a different definition or else it is overridden at a higher level i.e. at Line/Part or Form level.

 

EI Desc is a multi-line Field having aggregate UDF value.

Line 1, Line 2, Line 3 etc ---- are different.

Do you need per line justification ??? e.g. justification of Line 1 ?

 

In the Field ----
Add these 2 attributes ---
Print FG : White
PrintBG : Black

thereafter -- keep trying the various Print formats to find out which one is applicable to you.

When you Print+Preview --- the Black Background with white fonts will be visible in preview, if it does --- then that is the correct reference.