The default way of starting the dialog is ISPSTART ..... NEWAPPL(DRL) which implies a profile name of DRLPROF, an ISPF command table named DRLCMDS etc.
We have here at [Client] arranged for ISPSTART .... NEWAPPL(DRLL) for the Live system and added DRLLPROF and (today) ACTESTS.EPDM.DRLTENU to be a copy of SYSL.EPDM.SDRLTENU (wot I can't update) with DRLLCMDS, DRLLSORT, etc added.