I'm sure this is an easy one, but with my aleve/sudafed/dayquil diet this week, I'm sure my brain is just too fried to see the answer:

I want to key in a math line on a Fanuc 18.

X[#501+#502]

But at the control, hitting shift-4 and shift-5 gives me curved brackets, not square brackets!
I can do a file upload with the square brackets, and it works fine. But I would like to be able to edit at the control!

Is there something really obvious that I can't see? Or is this a parameter that needs to be changed?

Thanks