Across a Crowded Room

Well, not actually crowded, but . . . another example of my coworker's rudeness. Different coworker this time around, but same issue of being completely rude. This one woman who sits outside my office actually yelled to call me from her desk. Like I'm supposed to get up from my desk and come and see her? When she works (sometimes and unfortunately) for me? I don't think so. Or did she just expect me to yell back? Maybe we could all be more productive in an office environment where everyone just yells out what they need . . . once again I reiterate that I have got to find a new job.