How to manage Quotes Picklists values?
1. Go to CRM Menu -> Sales -> Quotes Menu.
2. Click Customize button in the top right. and Click Quotes Picklists value Menu.
3. First in Select module in module Field.
4. Select Picklist in your module.
5. Click + add Value button.
6. Open add item popup and Enter the information related to the Picklist.
7. Click Save button.