How do I add value to the Lead source in the Global Picklist?

Follow these steps to add value to the Lead source in the Global Picklist:

1. Log in to the CRM. 
2. Click the User Menu.
3. Click Settings. The Settings page opens. 
4. Go to the Configuration > Global Picklist. The Global Picklist page opens. 
5. Hover over the Lead Source. 
6. Click on the Edit in the Lead Source.
7. Click on Add Value and provide the required value.
8. Choose the color of your interest.
9. click Save.

Go to the Leads module and check the Lead source picklist, you will be able to see the newly added one.