In Bridge, you can add keywords to images to make searching for pictures a little less cumbersome. You don’t, however, want the process to become tedious as well. By either Command-clicking (PC: Ctrl-clicking) or Shift-clicking on images, you can select multiple files inside Bridge. Once you have the files selected, you can go to the Keywords panel and turn on any keyword you like. This will apply the keyword to all of the files that you have selected. It takes away a little bit of the pain of categorization, but just a little.