Salesforce - Developer - Page Layout

salesforce-developer

https://help.salesforce.com/HTViewHelpDoc?id=building_page_layouts_for_custom_objects.htm&language=en_US

// Salesforce - Developer - Page Layout

Page layouts define which fields users can view and edit when entering data for 
a custom object record.

When you create a custom object it comes with a default page layout. Tailor 
which data users enter for that object’s records by building your own page 
layout with related lists and custom links.

If you don’t use any page layout with your custom object, you can still interact 
with it by using the Force.com API to manage custom data or build a custom user 
interface.
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