+ AA6YQ comments below
I'm working on printing some QSLs for new 6m grids for stations not on LOTW. In the notes I'd like to print "TNX new grid DM81" or whatever. I have that figured out using QSL Message and the QSL Substitution Command <stationgrid>.
How can I include Grid2, Grid3, & Grid4 in the QSL message?
+ You must manually populate the "QSL Message" item for such QSOs.