Making mode commands symmetrical (or should I say complementary?)

[Wolfgang Bechstein bechstein@xxxxxxxx]

Currently, when I for example bold something in XyWrite 4 by using the
key assigned to "m2" in my keyboard file, I get ≪MDBO≫ at the
beginning and ≪MDNM≫ at the end of the bolded string. The same applies
for underline etc. I want to change this behavior so that I always get
≪MD+BO≫ at the beginning and ≪MD-BO≫ at the end of the string. How
can I achieve this?

Thanks in advance,

Wolfgang Bechstein
bechstein@xxxxxxxx