Deleting Shot Data
If you would like to determine how the shot statistics change by removing shots that have been entered, click the "Del Shot" tool button. Any shots entered can be removed. Simply click the indicator circle for the shot you wish to remove.

For "tutorial.gif," click the "Del Shot" tool button and remove several shots entered in the last tutorial step.  While doing so, watch how the shot statistics (especially the standard deviations and center-to-center group sizes) change as shots are removed.

NOTE: if you have overlapping shots, and you wish to remove one, you may have to delete both and re-enter the one you want to keep.

You can switch between any of the four modes at any time, but note that if you change the calibration or aim point with shots already entered, you will produce erroneous statistics.

You can clear ALL SHOTS, aim point and calibration for a target by clicking the "Clear Data" tool button.  You cannot recover cleared data; there is no way to Undo this operation.