On Drupal 7 sites I always spend time in the content view. That is the one at admin/content. I usually install the views bulk operation module so I get these cool new views that I can easily tweak. What a pleasure! Recently I was on a site that had the administration views module installed. This replaces the default views for content and comment (and more.) Unfortunately the link for editing the view that is so handy is turned off. This morning I decided to figure out how to turn it back on. I edited the view and in the advanced column, found a little link called "Hide Contextual Link."
Changing it to yes, made the little gear appear on the view and I'm a happy camper. I hope this saves you a few minutes.