---
title: "Identify labeling issues"
canonical: "https://help.vicon.com/space/ShogunPost121/1253737614/Identify%20labeling%20issues"
format: markdown
---
Use a 3D Scene view and the Labeling panel to help you to identify issues with labeling:

1. In the **3D Scene** view, select **View Filters**, and ensure that in the **Scene** section, **Missing Markers** is selected. Also ensure that in the **Subjects** section, **Label** is selected and that in the **L**(abeling) column of the views matrix, **Constraints** is selected.
2. In **3D Scene** view, scrub through the whole take (drag the current time indicator along the timeline, or for finer control, press the A or S key), noting times when markers are likely to be occluded (sitting, crouching, subjects interacting, etc).
3. In the marker list in the **Labeling** panel, note any missing (red) markers and watch for 'popping' or moving in the **3D Scene** view. Look for any swapped markers.  
Missing markers are clearly visible, and highlighted in red. However, after you've identified the erroneous markers, it may help with labeling to clear **Missing Markers** and **Labeling Constraints**.

 For an example of swapped knee and heel markers, see the Vicon video [5 - Shogun Post - Labeling Data](https://www.youtube.com/watch?v=BBCqKjJ4ASc).

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> > Macro (widget)

When you have identified any labeling issues, choose the most appropriate action:

- [Correct swapped labels](https://vicon-help.atlassian.net/wiki/spaces/ShogunPost121/pages/1253737219)
- [Label an unlabeled marker](https://vicon-help.atlassian.net/wiki/spaces/ShogunPost121/pages/1253738914)
- [Identify gaps using the Marker Editing panel](https://vicon-help.atlassian.net/wiki/spaces/ShogunPost121/pages/1253738715)
- [Fill gaps automatically](https://vicon-help.atlassian.net/wiki/spaces/ShogunPost121/pages/1253737634)
- [Fill gaps manually](https://vicon-help.atlassian.net/wiki/spaces/ShogunPost121/pages/1253737862)