> 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-domain-administrator-manual/admin/calibration/view-history.md).

# View history

An icon in “History” column shows that at least one calibration was started for the measuring point. Click the icon to open the calibration history.

![](/files/3NXXjIYmgpNo5XBHCPHI)

The history contains records of all the unfinished and finished calibrations of the selected MP with the offset measured. A click on the icon in “PDF” column will open a certificate from a given calibration as described in [View certificate](/boomerang-3-domain-administrator-manual/admin/calibration/view-certificate.md).


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