I open the program.
I type whatever I want.
I press cmd-s
I want the default filetype to be .txt
I don't want a .php file to then save as .txt, just that the default where nothing else is specified be .txt
I also don't want to have to open the Save As dialog. I just want it to save.
Right now on the mac the cmd-s is pretty useless as the system has no idea that ST2 should be the default and throws it into textedit as it's default.
I assume this is possible but if it's in a settings file it's well hidden.