Here is a list of all related documentation pages:

[detail level 1234]

▼Customization
▼Customizing Application User Interface
Customizing a Theme
Customizing Behavior
Customizing Content
▼Creating a Custom Object
▼Custom Functions and Task Types
Creating a Function
Creating a Task Type
Custom Objects as EJBs
Using Entities
▼Custom Form and UI Components
Creating a UI Component
Creating a Forms Component
Working with a Model
Customizing Entity Auditing
Build
Tests
Integration
Preparing Updates and Upgrades