As expected, you need to add it from the account fields area. So we'll go to Setup and search for "accounts". Click the "fields" item from the list.
On the first screen, select "picklist" like you normally would.
On the next screen (picklist definition), this is where it will change and we'll select the global picklist option.
Add in your field and label names as you normally would add a field. Click Next.
On the next screen, choose which global picklist you'll use on this object. Remember, global picklists will have the same choices on all objects which is very useful when mapping picklists (such as lead to account mappings).
Written by Prahba Krishnamurthy