The previous poster was correct that reserves can pick up open time, but left out that it's only on days off. You cannot pickup open time on your reserve days. You can call scheduling and ask to fly, but YMMV with the results of that. The only caveat is you can proactively pick up trips on long call reserve. For me being a commuter, I enjoy my days off and don't want to commute for extra pay. If you live in base, you can decide for yourself if you want to pick up trips on days off (only 12 on reserve).