How to use Azure labelling tool

In order to extract data from custom documents like invoices, we need to use the Microsoft Azure labelling tool https://fott-preview.azurewebsites.net/

For more details how to use sample labelling portal, please check https://docs.microsoft.com/en-us/azure/cognitive-services/form-recognizer/quickstarts/label-tool?tabs=v2-1#set-up-input-data

When using the sample labelling tool, we can compose multiple models into 1.
For instance, if we have invoices for multiple suppliers, we can build a model for each supplier and then compose all these models into 1. In this way we can handle multiple invoices as 1. For more details how to compose multiple models, please check
https://docs.microsoft.com/en-us/azure/cognitive-services/form-recognizer/quickstarts/label-tool?tabs=v2-1#compose-trained-models.

Composition tab in sample labelling tool: