How to globally change non-printing red to default cyan color in document

I'm working with a book template that someone else created. Screenshot attached. The frame edges, para symbols, text box links are all in bright red, which I find visually distracting. I want to restore them to default color (cyan?). I've tried everything I can think of, even deleted red from swatches, but nothing works. I know it's likely a simple command, but it escapes me. Thanks to all who respond.