Each client has a checkbox on the Client Details screen labelled "Active". When you create a client, their record is Active by default, but if you do not wish the client to appear in your index, say if they have moved away from the area and you no longer deal with them, then you can make them inactive.
By default, the alpha search and the wildcard search include only Active clients. If you wish to include inactive clients in your search, then click the "Include Inactive Clients" checkbox and your search results will include both active and inactive clients.
At this point you can also change a client's status from "inactive" to "active".
How do I find an Inactive client?
Check the box for "Include inactive clients" in the left hand sub menu. Inactive clients appear in grey type in the index.
To see an inactive client's record, click on their First or Last Name from the list.