> For the complete documentation index, see [llms.txt](https://help.boomerang3.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.boomerang3.com/boomerang-3-calibration-app-manual/calibration-app/info.md).
# Info
Tap “Info” in the right upper corner.
For B3 calibration enter the “Customer”, "Customer's representative" "Customer's address" and “Issued by”.
These data will be shown on the calibration certificate.
In case of Manual calibration there is additionally “User name and surname” field.
The user name is needed because in case of Manual calibration it is not read from B3.
Tap “Info” again to close the form.
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