To hear what a particular patch sounds like, click on the desired patch and press the Play Patch button.
To hear all patches, one at a time, press the Play All button.
To find all patches that have "Flute" in their name, press the Find... button, and then Find Next.
To write notes describing a particular patch, type them in the Notes field.
To see only patches of a particular kind, e.g. all Piano patches, change the field that says All to Piano.
When you are done, click on the Contents tab to return to the Table of Contents.