Website - explain all

I am trying the spf.pobox site. And cannot find <easily> an explanation 
of the flags for 'all'. -all, ~all, ?all or if there might be any 
others. I see in the wizard an explanation of what you have chosen. 
Seems like this is a fairly major oversight? I would think this to be 
the root information needed just after adding a record, to make 
decisions about how strict you want to be, and the item which will be 
tweaked the most often?
Best,
John Hinton