Some people write by the seat of their pants, some folks plot in advance. Even the pantsers sometimes need to see a short sequence events when they have multiple characters coping with multiple interleaved events.

The Plotter tool helps you lay out a complex timeline. You can track where and when each character is, what they are doing, who they are interacting with and more.

It was designed to track multiple actors performing multiple actions on different timelines and passing multiple mcguffins from character to character.

You can use plotter for short sequences where you need to keep track of just who does what when to make sure you have a body before the body is discovered, or for long sequences when you are plotting a huge opus that's too much to hold in your head.