Noobie Brake Job Question

I’m going to be doing my first full brake job soon on my 2016 Kia Rio LX. I have watched many videos and done some reading and feel confident. However, I have seen conflicting information on one point - do I need to open the bleeder valve on each caliper when depressing the pistons back?

This is the only part I’m not super confident on, since I read stories about accidentally allowing air into the brake line which can cause issues.

Any advice would be appreciated. Thanks guys!