A field with this keyboard shift attribute does not accept data typed in from the keyboard, and an error is issued if you press any keys.
You can press the field advance key to position the cursor at the start of the field. This field can be used to allow input from feature devices such as a light pen. The Field+, Field Exit, and Dup keys are valid for a field with this attribute, and function the same as if pressed in any input field for which the Display Attribute Protect (DSPATR(PR)) keyword is not in effect.
The extra position in the display length is for the decimal point.