The clusters tool shows word clusters based on your search term, i.e. it searches and returns words that occur next to your search term.

• “Cluster Size”: determine the size of your cluster. Note that the cluster size includes your search term: e.g. if you set "Min." to 2 and "Max." to 2 AntConc returns your search term and one word either to the left or right of the search term
•  “Search Term Position”: specify the position of the cluster relative to your search term, i.e. set the position to either show words to the left (choose: "Search Term Position" = "On Right") or right (choose: "Search Term Position" = "On Left") of your search term
• “Sort by”: order your clusters. Clusters can be ordered, e.g. by frequency or probability (see the AntConc manual for more options)