How to remove underline from protected I/O field in display file?

I guess it's been a really long time since I've done this.

A INTADMFLG 1A B 5 26
A 89 DSPATR(RI)
A 89 DSPATR(PC)
A 89 COLOR(RED)
A DSPATR(PR)

The DSPATR(PR) is new because I now need to keep this field from being
modified on our "update" display. But I also need this field to remain as
an input field to the program, and this is why I am keeping the Usage as
'B'. How do remove the underline from this field? This will confuse users
who expect that an underlined area on an "update" display means that it can
be modified. I was pretty sure this could be done, but I may be
mismembering.

- Dan