Can I amend the indexes on my ISAM files?

You cannot directly amend the indexes set on your ISAM files. However, you can use the Easysoft Administrator to amend the way that the indexes are read by the SQI-ISAM driver. If you feel a query would run better using the secondary or tertiary index rather than the primary one, these can be bumped up the execution order. The driver can then use these indexes in preference to the primary index.