Inputting and Outputting Media > Legacy File Import Using Import Media > About Using Import Media > About the Import Media Menu Options >
Library Operations Options

Use these options to select what and how files are displayed for import.

Generate Proxy button
  Click to generate thumbnail proxies in the Clip Library view.
Scan Subdirectories button
  Enable to display all of the image sequences that are detected in the nested subdirectories of a directory structure.