FLY is FUN

Hi, when you try to save the descend rate of one aircraft, the app says the number has to be negative but in my samsung S3 keyboard I don't have the minus sign and no options to select it.

I found no option to configure it, you can detail the steps?
I have a S3 and (-) sign is in the keypad in the standard script, perhaps within FyF be different.

Sorry, my mistake, the minus sign is in the same key with the dot