I’m trying to use Custom Fields to create supplier details not included in set up, i.e. phone number, contact name etc, but they don’t appear with the other suppliers details,
ps I’m new to Manager 
Where do you want them to appear?
Thanks for your reply, when I enter new supplier there doesn’t seem to be anywhere to note the company contact name, (individual sales rep) phone number etc, I tried settings >custom fields, but noting appears on the supplier field when I go back to it.
You need to be more specific. What do you mean by “the supplier field?” On what form? And what do you mean by “go back to it?” Have you read the Guide about custom fields: Use custom fields | Manager?