The Clip History feature tracks and updates operations you have applied to a clip or clip segment. It expands the clip, providing a view of your operations. To easily see all of a clip's operations, you can display the clip history in the Batch schematic. You can then use the clip history in Batch as an access point for modifying clips. You can modify a clip at any point in its history.

Clips that have a clip history contain sources and intermediates. Sources are any of the original clips used to build an effect, for example, clips captured using an EDL. Intermediates are clips that are created when building a clip that uses multiple effects or operations.

There are three ways that you can modify a clip using its clip history:

• The simplest way of using clip history is to load a processed clip back into the last module that was used to create the clip. For instance, you load a clip into the Colour Corrector, modify the colour, and process a new clip. You decide that you want to change the colour slightly, so you double-click the “H” icon of the new clip to go back into the Colour Corrector with the settings restored. You tweak the values slightly, and then process another clip (which has its own clip history).
• If multiple modules were used to create a clip, you can load them all into a Batch setup and make modifications at any point in the process tree. For instance, you may have created a composite by bringing a colour-corrected back layer into the Master Keyer with a front and key-in layer that may also have been modified (for example, with a Flip). By loading the resulting clip into Batch, you can modify it at any point in the process tree, and then process a new clip.
• If you edit together clips to create a clip with soft edits, and at least one of the clips has clip history, you can modify its segment in the Batch timeline. With this method, you access the Batch timeline, select the segment, and then expand it into a Batch process tree. You can then make changes to any of the nodes or clips. When outputting these modified clips, you have the choice of processing the entire clip, or a modified segment only.

If you expand a clip history with an Action module, only the Action media that contain clips with history will be expanded. Media without history are simply loaded as Action media.