I run a 1983 Mori Seiki MH40 HMC at work with a Fanuc M6B controller . When inputting data manually e.g. punching a program into the machine by hand I cannot find any button that acts as a shift key. There are keys with 2 different letters or a letter and a symbol on them so it would seem there has to be a shift key or a button that acts as one somewhere . Any help would be appreciated.