A new timeline for tracks: more clarity, less guesswork

1 min read -
A smiling man with short brown hair, Justin Beriot, stands in front of a dark geometric background.
- September 10th, 2025 -

We’ve redesigned the track timeline in Segments to make it easier to see what’s changing and where. The old timeline compressed too much information into too little space. The result: tedious workflows, accidental data loss, and a lot of unnecessary clicking.

This update introduces a new layout system, a reimagined track timeline, and a set of foundational improvements that make it easier to see and control how objects evolve across sequences.

What changed

1. More space to work

We’ve restructured the layout to give labellers more real estate, reduce UI jumping, and keep key tools in consistent locations.

  • The sensors list now lives in the right column

  • The scene information now spans the full height of the screen

  • The timeline now spans the full width of the screen for better access and less clutter

This creates a more stable, predictable interface. And clears the path for a more powerful timeline.

2. A smarter, scalable timeline

The new timeline gives a clearer view of where objects exist in a sequence, and how their attributes evolve over time. No more guessing. No more clicking through every frame to spot differences.

Key features

  • Track bars show when objects are present, using colors that match the object in the scene

  • Keyframes are visualized as diamonds on top of the track, just like before

  • Segments represent visibility intervals, useful for handling presence changes
  • Deleted keyframes are displayed as blocked-out regions

This lets you instantly see where an object is tracked and when its position, dimensions, or attributes change.

Bar chart showing object categories and occurrence counts across 40 intervals, with colored bars and diamond markers.

Interaction that makes sense

We’ve added controls to help you move through sequences faster and with more intent.

  • Collapsed and expanded states let you toggle focus between the scene and the timeline

  • Frame navigator in the expanded view allows jumping to any frame and object

  • Current frame indicator is always visible in the collapsed state

You can also interact with keyframes directly:

  • Select, move, delete, copy, and paste keyframes
  • Movement is constrained to the segment where the object exists, so data integrity stays intact

Built to grow

This version of the timeline focuses on positional and dimensional attributes, the stuff that changes most during labeling. But it’s designed to scale. Future updates will bring support for semantic attributes, richer visual cues, and more control over frame-level data.

Available now

The new timeline is live. It’s more visual, more navigable, and better aligned with how you actually work. Try it out and let us know what’s useful, what’s missing, and what you’d like to see next.