How to manage Project Milestones Picklists values?
1. Go to CRM Menu -> Projects -> Project Milestones Menu.
2. Click Customize button in the top right. and Click Project Milestones 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.