The Contest Helper Window has two main sections - the K5ZD Call Completion table and the Duplicates table. These two tables are updated dynamically as you type a call into MacLoggerDX - not waiting for a lookup.
"Super check partial is a feature that K1EA first introduced in his CT logging software. It enables the use of a database to extend the list of calls that appear in the check partial call window. Used correctly, it can help you more quickly pull a call out of the QRM. Used incorrectly, e.g. to guess calls, it can result in stupid mistakes and significant score reductions. Caveat emptor!" - Randy Thompson, K5ZD
The Duplicates table is a user-configurable dupe checking tool that will check duplicate QSO's in your log based on date and time, band, mode and exact match.
The Cluster check box looks for duplicates in triple-clicked DXCluster spots and Bands Panel clicks.
The Contest Timers display QSO's per Minute, Time since Last Logged QSO and Time since Last Band Change and can be set to zero with the Reset button.