If you find that some fields are not useful, or would like to record different information than is initially set up you can change a selection of field names to more suitable names for your own use.

Simply go into Administration and select “Edit Field Names and Labels”
You then need to choose 'Custom' rather than default, this will give you a list of available terms which can be changed.

To change a field, simply click the term on the right and enter the new term.
You can change back to default at any time.

 
Most fields can be changed apart from those such as Total / Date / Invoice etc.