Create a Global option set

1. Login to CRM.

 CRM

2. Go to Settings, Advanced settings.

Advanced settings

3. Go to Customizations and customize the system.

Customize the system

4. Click on Option Sets and click on New.

Option Sets

5. Provide the Display Name and the options you want to add. Click On Save and Close.

 Display Name

Create an Option set by using the Global Option Set

Go back to Customizations. Click on Account Entity, Fields, and Click on New.

Account

Enter the display name of the option set field and the following field properties.

Now, you have successfully created an option set field by using the global option set.

Thanks.!