Since Columns Viewer will be removed in JMP 19 and I found the subset functionality very useful, I am wondering whether JMP 19 will permit the same via Columns Manager. For now, subsetting of columns is; I think; the only reason why I'm using the Columns Viewer. In JMP 18, however, I get a big fat warning to use the Columns Manager.

Alright, I get it but I can't see that the columns manager has this capability (documentation: About the Columns Manager). I think this may be a case for creating an add-in - that is, if one doesn't exist already.