PRTF Compile Options - USRDTA?

Please, someone tell me that I'm blind.  I have a print file that we compile 
with a specific USRDTA value, and I'm trying to find the USRDTA keyword 
somewhere in the PRTF Compile Options.  I've looked at ever tab, and I don't 
see it.  I searched the help, and the only mention of the keyword is something 
to do with joblogs.  I searched the archives for both this list and WDSCi-L, 
and no one has asked this question before.  I know it's a trivial thing, but 
it's bugging me - is it missing, or am I blind?  And please, if I'm blind, tell 
me where to have my seeing eye dog look for it!

Thanks!

Dave Shaw