Anchor elevation will affect the amount of stress the downguys are supporting. We measure the elevation relative to the base of the pole.
For example, if the anchor is on a hill approximately 5' above the ground at the pole, the anchor elevation would be 5. If the anchor is downhill, you can put a "-" in front of the number to show it is below the base of the pole.
In most circumstances it will be ok to estimate this measurement.
Once all of that information has been measured and recorded, the main camera operator will scroll to the bottom and select "OK." If additional anchors are present, you can restart the process to collect all the details relative to each one. Once the last anchor has been collected, switch to the checklist tool and resume taking photos. Don't forget to press "Done" once all photos have been taken.