The OCR technology is provided by Google and Microsoft (more systems may be added in the future). You need to obtain credentials from either of those. Both propose free plans and the free plans allow to convert up to 5000 images per month. Pretty much. Beyond that you are charged but the cost is very reasonable.
Go to Settings > Image to Text (OCR) and enable the systems you need:
How to configure
You can configure this feature under Settings, then Image to text (OCR) and switch on a system:
Systems available
Google OCR - Printed text (supported file formats: PNG, BMP, JPG, RAW, TIFF, WEBP, GIF and ICO images)
Microsoft OCR - Printed text (supported file formats: BMP, JPG and PNG images)
- Microsoft OCR - Handwritten text: This option is for reading English handwritten text (supported file formats: BMP, JPG and PNG images)
The sign-up process with Google and Microsoft is not the most intuitive. If you have any questions please contact our support team.