Document Understanding user guide

You decide when your models train. Once you have made enough annotations or classifications, you start a training run by clicking the Start Training button. Training does not begin in the background on its own.

There is one Start Training button per trainable model.

Classifiers:

Extractors: Each document type's annotation page, in the header bar (top-right area).

In addition, the Model Training status pill hosts a Start Training action. The pill appears next to each trainable model or document type across the application, which means you can start an extractor training without navigating to its annotation page.

The button is not shown on the Build homepage as a standalone control, but the status pill on each document-type card does include the action.

The button's enabled state depends on what has changed since the last training and whether a training is already in flight.

Each annotation or classification modification counts as one change. For example, annotating a field on a document or classifying a page both count. The changes counter resets after a successful training run. Document type schema or base model changes count as major changes and bypass the required change threshold.

Status pills appear next to each trainable model or document type across the application. The pill reflects the current state of that model's training, and (where applicable) exposes the Start Training action.