# Reviewing standard deviations after rounds

When measuring rounds, use the standard deviation information shown after each round to review the quality of the observations and remove poor observations.

Each individual round is stored to the job only when you tap Close or + Round to exit the Standard deviations screen.

To observe another round, tap + Round.

To store the current rounds session, tap Close. Tap Yes to confirm.

To view more information about a point, select it and then tap Details.

To view or edit the residuals of each individual observation to a point, tap the point in the list once.

If you have enabled a measured point to be added to a CSV file, select the Add to CSV file option.

To exit from rounds and delete all rounds observations, tap Esc.

If you tap +Round after the instrument has completed the required number of rounds, the instrument performs one more round of observations. If you want the instrument to perform more than one extra round, enter the total number of required rounds before you tap +Round.

For example, to measure three rounds automatically, and then measure another three rounds:

1. Enter 3 in the Number of rounds field.
2. Once the instrument has measured 3 rounds, enter 6 in the Number of rounds field.
3. Tap +Round. The instrument measures the second group of 3 rounds.