A distinction is made between a Primary Fielder and Assistant Fielders when entering wickets, to allow multiple fielders to be attached to that dismissal. Only the Primary Fielder will be credited with a catch or run out in Player Averages, but they and all Assistant Fielders will be associated with catches and run outs in both Stats Wizards for analysis purposes. Sub-Fielders can also be added and selected when entering a wicket and they will be added to all fielder lists for the rest of the match.
When entering a Caught dismissal, the Primary Fielder is the fielder who completes the catch. Assistant (Asst) Fielders are any others who touched the ball during the catch. These fielders will be shown in order on the Scorecard and Scorebook, etc, so the Primary Fielder is listed last, as they completed the dismissal.
When entering a Run Out dismissal, the Primary Fielder is the fielder who does the most to complete the run out. The Assistant (Asst) Fielders are any others who touched the ball during the run out, e.g. the player who effects the run out, most likely the bowler or wicketkeeper, by breaking the wicket. These fielders will be shown in the opposite order on the Scorecard and Scorebook, etc, so the Primary Fielder is listed first, as they contributed most to the dismissal.
For Stumpings, only a Primary Fielder can be entered, and this will default to the nominated Wicketkeeper (including a replacement wicketkeeper) with Wicketkeeper as Fielding Position as soon as Stumped is selected under Dismissal Type.
Finally, if a New Sub-Fielder is involved in a dismissal, click this button, type their name into the Name text box, and click Save. This will automatically add them as the Primary Fielder and to the bottom of this and all Asst Fielder lists for the rest of the match.