Hi after firmware update there is no compass calibration  like i had before ,used to just click on details on start up and could do . no longer there?

If a compass calibration is required, you will be prompted.

cheers buddy

Otherwise, Compass Calibration is surely hiding down in the menu.  I don't have my drone with me at the moment, so I can't point you to a direct location.  Many on this page  would recommend only re calibrating when prompted.