2 answers
Hello Tricia,
As per my assumption, you want to add new values in the type field available in the campaign object.if my assumption is correct then please follow the steps as below or you can give more explanation on this with a screenshot that what actually you are trying to do.
Go to Setup -> Customize --> [Object on which the picklist you wish to edit exists] --> Fields
Click on the Field Label Name of the field you wish to edit In the Pick List Values section, click the "New" button Add the value(s) as desired.
Please check the below link for screenshots.
https://success.salesforce.com/answers?id=90630000000gscSAAQ
