Editing : Edit Modes and Tools : Spot Mode

Spot Mode
Use Spot mode to place clips at precise locations. In Spot mode you can specify a frame location (or a location based on any of the other time formats), capture an incoming Timecode address, or use a clip’s time stamps as reference points for spotting. This can be particularly useful when performing post production tasks around SMPTE frame locations.
When Spot mode is enabled, Pro Tools asks you to specify a destination location when a clip is dragged from the Clip List, a DigiBase browser, Windows Explorer, or the Mac Finder.