I’ve always struggled with negative displays on digital watches but I put this aside when picking up the GBD-200.

What I’ve found in these last couple of days is I’m struggling with this one too. I either have a dud or it’s not as bright as the Casio site would have you believe. I’m going to return this one and check if it’s the battery or exchange for another model.
For me right now the display is too hard to read.