Adding a Custom Account Field

You can add a custom field to the Accounts object to record details not readily available in the standard existing data entry options.  

Navigate to Setup >> App Setup >> Customize >> Accounts >> Fields

Account Fields Page

Accounts Fields page

Scroll down past Accounts Standard fields to the Accounts Custom Fields and Relationships section.

New Custom Account Field

Step 1: Choose the Field Type

Account: New Custom Field ~ Step 1. Choose the field type

Specify the type of information that the custom field will contain.  Select the Data Type for the field to be added.

Step 2: Enter the Details

Account: New Custom Field ~ Step 2. Enter the details

Custom fields marked as Unique count against an object's limit of three External ID fields.

Step 3: Establish Field-Level Security

Account: New Custom Field ~ Step 3. Establish field-level security

Select the profiles to which you want to grant edit access to this field via field-level security.  The field will be hidden from all profiles if you do not add it to field-level security.

Step 4: Establish Field-Level Security

Account: New Custom Field ~ Step 3. Establish field-level security

Select the page layouts that should include this field.  The field will not appear on any pages if you do not select a layout.  When finished, click Save if you are done or click Save & New to create more custom fields.

Account Detail Page: Default Field Location

Account detail page ~ default field location

The field will be added as the last field in the first 2-column section of these page layouts.  To change the location of this field on the page, you will need to customize the page layout.  To change the location of this field on the page, you will need to click Edit Layout.

Account Page Layout: Edit Page

Account page layout edit page

Click and drag the new Account field and Drop it in another location.  Alternatively, click Layout name to make changes to other page layouts as needed.  Click Save to save changes to Layout. 

Account Detail Page: Desired Field Location

Account detail page ~ desired field location

For additional custom field attributes information see Force.com's: